20XX_20XX学年高中物理第三章传感器章末总结学案教科版选修

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2018_2019学年高中物理第三章传感器章末总结学案教科版选修 本文关键词：第三章，选修，学年，传感器，教科

2018_2019学年高中物理第三章传感器章末总结学案教科版选修 本文简介：第三章传感器章末总结传感器一、常见敏感元件的特点及应用1．光敏电阻：光敏电阻的阻值与所受光照的强度有关，光照增强阻值减小，光照减弱阻值增大．2．金属热电阻：金属热电阻的电阻率随温度升高而增大．3．热敏电阻：热敏电阻有正温度系数和负温度系数两种．正温度系数的热敏电阻的阻值随温度升高而增大，负温度系数的

2018_2019学年高中物理第三章传感器章末总结学案教科版选修 本文内容：

第三章

传感器

章末总结

传感器

一、常见敏感元件的特点及应用

1．光敏电阻：光敏电阻的阻值与所受光照的强度有关，光照增强阻值减小，光照减弱阻值增大．

2．金属热电阻：金属热电阻的电阻率随温度升高而增大．

3．热敏电阻：热敏电阻有正温度系数和负温度系数两种．正温度系数的热敏电阻的阻值随温度升高而增大，负温度系数的热敏电阻的阻值随温度升高而减小．

4．霍尔元件能够把磁感应强度这个磁学量转换成电压这个电学量．

例1

如图1所示是一火警报警器的部分电路示意图．其中R2为用半导体负温度系数热敏材料制成的传感器，电流表为值班室的显示器，a、b之间接报警器．当传感器R2所在处出现火情时，显示器的电流I，报警器两端的电压U的变化情况是

(

)

图1

A．I变大，U变大

B．I变大，U变小

C．I变小，U变大

D．I变小，U变小

解析

R2所在处出现火情时，温度升高，则R2的阻值减小．R2↓→R总↓→I干↑→U1↑→U3↓→I↓，故显示器的电流I变小，由U＝E－I干r，I干变大，知U变小，故选项D正确．

答案

D

针对训练

如图2所示是某居民小区门口利用光敏电阻设计的行人监控装置，R1为光敏电阻，R2为定值电阻，A、B接监控装置．则(

)

图2

①当有人通过而遮蔽光线时，A、B之间电压升高

②当有人通过而遮蔽光线时，A、B之间电压降低

③当仅增大R2的阻值时，可增大A、B之间的电压

④当仅减小R2的阻值时，可增大A、B之间的电压

A．①③

B．①④

C．②③

D．②④

答案

C

解析

R1是光敏电阻，有光照射时，阻值变小，当有人通过而遮蔽光线时，R1的阻值变大，回路中的电流I减小，A、B间的电压U＝IR2减小，故①错误，②正确；由闭合电路欧姆定律得：U＝E－I(R1＋r)，当仅增大R2的阻值时，电路中的电流减小，A、B间的电压U增大，故③正确；当仅减小R2的阻值时，电路中的电流增大，A、B间的电压U减小，故④错误，故应选C.

二、传感器的应用

1．传感器的应用

传感器的应用过程包括三个环节：感、传、用．

(1)“感”是指传感器的敏感元件感应信息，并转化为电学量．

(2)“传”是指通过电路等将传感器敏感元件获取并转化的电学信息传给执行机构．

(3)“用”是指执行机构利用传感器传来的信息进行某种显示或某种动作．

2．传感器电路问题的设计思路

处理与传感器有关的电路设计问题时，可将整个电路分解为：

(1)传感器所在的信息采集部分；

(2)转化传输部分(这部分电路往往与直流电路的动态分析有关)；

(3)执行电路．

例2

传感器担负着信息的采集任务，在自动控制中发挥着重要作用，传感器能够将感受到的物理量(如温度、光、声等)转换成便于测量的量(通常是电学量)，例如热敏传感器，主要是应用了半导体材料制成的热敏电阻，某热敏电阻RT阻值随温度变化的图线如图3甲所示，图乙是由该热敏电阻RT作为传感器制作的简单自动报警器线路图．问：

图3

(1)为了使温度过高时报警器铃响，c应接在________(填“a”或“b”)处．

(2)若要使启动报警的温度提高些，应将滑动变阻器的滑片P向________移动(填“左”或“右”)．

(3)如果在调试报警器达到最低报警温度时，无论如何调节滑动变阻器的滑片P都不能使报警器工作，且电路连接完好，各电路元件都能处于工作状态，则造成工作电路实际不能工作的原因可能是______________________________________________________________．

解析

热敏电阻RT在温度升高时阻值变小，电路中电流变大，电磁铁磁性增强，把右侧衔铁吸引过来，与a接触，故c应接在a处；为使启动报警的温度提高，则应使电路中电阻更大，这样使报警温度提高，滑片应左移．

答案

(1)a

(2)左

(3)电源提供电压太小，以至于电磁铁磁性太弱或弹簧劲度系数太大

例3

一热敏电阻阻值随温度变化的图像如图4甲所示．请应用这一热敏电阻自行设计一控制电路．当温度高于某一值后红色指示灯亮，则温度低于这一值时绿色指示灯亮．

图4

给你的器材有：如图乙所示的继电器一个(a、b为常闭触点．c、d为常开触点)、热敏电阻一只、滑动变阻器一只、红绿色指示灯各一个、两个独立的电池组、开关两个、导线若干等．

解析

由题图中甲可以看出热敏电阻的阻值随温度升高而减小，是负温度系数的热敏电阻．当温度低于这一值时，热敏电阻的阻值较大，流过电磁铁的电流较小，a、b为常闭触点，连接上绿灯，绿色指示灯亮．当温度高于这一值时，热敏电阻的阻值较小，流过电磁铁的电流较大，c、d被闭合，连接上红灯，红色指示灯亮，滑动变阻器作限流式连接，通过调节满足热敏电阻对某一温度的控制．

答案

设计的控制电路如图所示．

1．(常见敏感元件的特点及应用)

如图5所示，RT为正温度系数热敏电阻，R1为光敏电阻，R2和R3均为定值电阻，电源电动势为E，内阻为r，为理想电压表，现发现电压表示数增大，可能的原因是(

)

图5

①热敏电阻温度升高，其他条件不变

②热敏电阻温度降低，其他条件不变

③光照增强，其他条件不变

④光照减弱，其他条件不变

A．①③

B．①④

C．②③

D．②④

答案

D

解析

电压表示数变大，而R3为定值电阻，说明流经R3的电流增大，由电路结构可知，这可能是由于RT阻值减小或R1阻值增大，由热敏电阻和光敏电阻特性知，可能是由于温度降低或光照减弱，故②、④正确，①、③错误．

2．(传感器的应用)如图6所示是一种水位自动报警器的原理示意图，当杯中的水的水位到达金属块B时，出现的情况是

(

)

图6

A．L1灯亮

B．L2灯亮

C．L1、L2两灯同时亮

D．L1、L2两灯都不亮

答案

B

解析

由电路结构可以看出，当杯中的水的水位到达B时，左端电路被接通，这样螺线管就产生磁场，相当于一个磁铁，对与弹簧相连的衔铁产生吸引作用，使之向下移动，这样L2电路被接通．

3．(传感器的应用)如图7所示为大型电子地磅电路图，电源电动势为E，内阻不计．不称物体时，滑片P在A端，滑动变阻器接入电路的有效电阻最大，电流较小；称物体时，在压力作用下滑片P下滑，滑动变阻器有效电阻变小，电流变大，这样把电流对应的重量值刻在刻度盘上，就可以读出被称物体的重量值．若滑动变阻器上A、B间距离为L，最大阻值等于定值电阻的阻值R0，已知两弹簧的总弹力与形变量成正比，比例系数为k，则所称物体的重量G与电流大小I的关系为

(

)

图7

A．G＝2kL－

B．G＝kL＋

C．G＝＋kL

D．G＝kL

答案

A

解析

设放上物体后，滑片P向下滑动x，处于平衡．

由受力平衡得：G＝kx①

由闭合电路欧姆定律得：(R0＋R0)I＝E②

由①②得：G＝2kL－.

4．(传感器的应用)用如图8所示的电磁继电器设计一个高温报警器，要求是：正常情况绿灯亮，有险情时电铃报警．可供选择的器材如下：热敏电阻、绿灯泡、小电铃、学生用电源、继电器、滑动变阻器、开关、导线．

图8

答案

如下图所示．

解析

将热敏电阻、学生用电源、滑动变阻器、开关串联接入继电器的a、b端；将学生用电源与电铃、绿灯泡分别接入c、d、e之间．正常情况时热敏电阻阻值大，ab间电流小，电磁铁磁性弱，c、e接通，绿灯亮，温度升高时，热敏电阻阻值变小，a、b间电流变大，电磁铁磁性变强，吸住衔铁，c、d接通，c、e断开，绿灯灭，电铃响．

篇2：优化方案）20XX高考英语一轮复习 Unit18课时活页训练(详细解析) 北师大版选修

优化方案）2011高考英语一轮复习 Unit18课时活页训练(详细解析) 北师大版选修 本文关键词：课时，选修，高考英语，复习，解析

优化方案）2011高考英语一轮复习 Unit18课时活页训练(详细解析) 北师大版选修 本文简介：优化方案2011高考英语一轮复习课时活页训练Ⅰ.单项填空1．(2009年高考江西卷)Frankputthemedicineinatopdrawertomakesureitwouldnotbe________tothekids.A．accessibleB．relativeC．acceptableD．s

优化方案）2011高考英语一轮复习 Unit18课时活页训练(详细解析) 北师大版选修 本文内容：

优化方案2011高考英语一轮复习课时活页训练

Ⅰ.单项填空

1．(2009年高考江西卷)Frank

put

the

medicine

in

a

top

drawer

to

make

sure

it

would

not

be________to

the

kids.

A．accessible

B．relative

C．acceptable

D．sensitive

解析：选A。句意：弗兰克把药放到最上面的抽屉里，确保它不被孩子们够到。accessible易接近的；relative相对的，比较的；acceptable合意的，受欢迎的，可接受的；sensitive敏感的。根据句意应选A。

2．The

price

of

beer

________

from

50

cents

to

$4

per

liter

during

the

summer

season.

A．ranged

B．differed

C．altered

D．separated

解析：选A。考查动词辨析。句意：今年夏季啤酒的价格在每升50美分到4美元之间变化。range变化，变动，常用于range

from.to.中，意为“从……延伸到……，在……范围内变化”。differ

from与……不同；alter改变；separate分开。

3．________

from

media

reports，the

result

has

been

unclear.

A．To

judge

B．Having

judged

C．Judging

D．Judged

解析：选C。在英语中，有一些常用的惯用语：generally

speaking一般说来；judging

from由……看来，根据……判断；concerning关于，这种表达形式都是固定的。句意：根据媒体的报道判断，结果还不明朗。

4．We

sat

side

by

side，watching

him

cross

a

street，________

I

was

never

allowed

to

cross

unless

________.

A．the

one；being

accompanied

B．that；accompanied

C．one；accompanied

D．which；accompanying

解析：选C。one代替a＋前面限制的名词，accompany和I之间为被动关系，故用过去分词。

5．The

PLA

man

________

of

by

some

local

villagers

as

a

hero

in

the

fighting

against

the

flood

is

well

________

everywhere.

A．thinking；treated

B．regarded；treated

C．considered；treating

D．thought；treated

解析：选D。本题考查动词主谓搭配。从句子结构上看，第一个空一直到the

flood应该和the

PLA

man之间构成修饰和被修饰的关系，是分词短语作后置定语，因“the

PLA

man”和后面的动词是被动关系，所以应该用过去分词，故选项A是错误的；因题干中带有of，形成(be)thought

of.as.的形式，另外regard/consider.to

be/as.所以选项B、C也应排除。

6．Reaching

an

agreement

so

quickly

was

a

great

________

for

the

meeting.

A．appointment

B．access

C．achievement

D．approach

解析：选C。句意：如此快达成了协议对这个会议来说是一个巨大的成就。appointment约会；access进入；achievement成就，进步；approach方法，步骤，根据句意，应选C项。

7．________

you

keep

on

trying，I

don’t

really

mind

whether

you

can

come

top

in

your

class.

A．So

long

as

B．As

soon

as

C．Once

D．The

moment

解析：选A。so

long

as或as

long

as意为“只要……”，引导条件状语从句。另外B、D两项多引导时间状语从句，C项可引导条件状语从句，但意义与句子不符。

8．He

put

his

oars

in

the

water

and

________

the

smooth

surface

of

the

lake.

A．disturbed

B．interrupted

C．bothered

D．stopped

解析：选A。句意：他把桨放入水中，搅乱了平静的湖面。disturb打扰，搅乱；interrupt打断；bother打扰，麻烦(某人)，使(人)恼怒；stop停止，阻止。

9．She

is

not__________what

to

do.

A．keenly

on

telling

B．keenly

on

being

told

C．keen

on

being

told

D．keen

to

be

told

解析：选C。be

keen

on

doing

sth.喜欢做……。此处需用被动语态，所以选C。

10．The

umbrella

is

used

to________

yourself

from

rain.

A．prevent

B．keep

C．save

D．protect

解析：选D。protect.from.意为“保护……不受……之害/苦”。

11．The

animal

with

the

biggest

head

________

its

body

is

the

ant.

A．in

relation

to

B．in

connection

to

C．in

terms

of

D．in

the

course

of

解析：选A。in

relation

to与……相比。句意：与其身体相比，头最大的动物是蚂蚁。in

terms

of用……的话，从……方面说；无in

connection

to这种结构；in

the

course

of在……期间。

12．News

reports

say

peace

talks

between

the

two

countries

have

________

with

no

agreement

reached.

A．broken

down

B．broken

out

C．broken

in

D．broken

up

解析：选A。break

down意为“破裂，分解”；break

out突然爆发，逃脱；break

in闯入，插话；break

up分解，结束，解散。句意：新闻报道说两国之间的和平谈判破裂了，没有达成协议。

13．Under

the

________

of

its

host，the

loyal

hunting

dog

is

wandering

in

the

forest.

A．demand

B．control

C．command

D．request

解析：选C。under

the

command

of

sb.为“在某人的指挥之下”。

14．Her

book

is

honest

without

________，and

it’s

worth

________.

A．sentimental；being

read

B．being

sentiment；reading

C．being

sentimental；reading

D．sentiment；being

read

解析：选C。句意：她的书是诚实的理性的，值得一读。sentimental非理性的；be

owrth

doing.值得做。

15．We

sat

side

by

side，watching

him

cross

a

street，________

I

was

never

allowed

to

cross

unless________.

A．the

one；being

accompanied

B．that；accompanied

C．one；accompanied

D．which；accompanying

解析：选C。one代替a＋前面限制的名词，accompany和I之间为被动关系，故用过去分词。

Ⅱ.阅读理解

A

Facing

the

threat

of

the

Internet，the

traditional

newspaper

is

thinking

about

what

it

can

do

to

meet

the

challenge.To

make

teens

get

into

the

habit

of

reading，the

French

government

is

considering

what

kind

of

efforts

it

should

pursue.It

seems

that

the

two

questions

have

nothing

to

do

with

each

other，but

a

recent

announcement

made

by

French

President

Nicolas

Sarkozy

has

connected

these

two

issues

together.The

announcement

gives

an

answer

to

both

of

them.

President

Nicolas

Sarkozy

announced

a

rescue

plan

for

France’s

ailing

print

media，including

measures

to

save

printing

and

distribution

costs.

The

plan

also

gives

French

teenagers

a

surprise

as

their

18-year-old

birthday

gift：France

will

offer

all

18-year-olds

a

free

daily

copy

of

the

newspaper

of

their

choice.

“The

habit

of

reading

the

press

should

start

at

a

very

young

age，”Sarkozy

said，presenting

the

conclusion

after

talking

to

a

group

of

journalists

and

officials

in

Paris.

The

President

said

the

newspapers

themselves

would

provide

free

copies

for

18-year-olds，while

the

state

would

cover

the

cost

of

delivering

them

to

many

thousands

of

homes.

The

plan

is

an

attempt

to

introduce

teenagers，who

frequently

only

get

their

news

online，to

the

delights

of

the

printed

world.

A

similar

idea

has

been

tested

by

L’Ouest

France

(法兰西西部报)

over

the

past

few

years.

It

offered

some

18

to

24-year-olds

a

free

paper

once

a

week

for

a

year.

L’Ouest

France

reported

that

15%

of

young

people

wanted

to

continue

with

a

paid

subscription(订阅)after

the

year

was

over.

People

in

France

welcomed

the

plan

which

should

get

more

kids

interested

in

current

affairs

and

make

reading

be

a

pastime，as

well

as

rescue

the

newspaper

industry.

1．What

does

the

underlined

word“ailing”(in

Paragraph

2)probably

mean?

A．newly

established

B．in

difficult

situations

C．most

popular

D．warm-hearted

解析：选B。词义猜测题。该段说法国总统萨科奇宣布救援计划，以挽救“处于困境中的”印刷媒体。由此判断其含义是B。

2.It

can

be

inferred

from

the

passage

that

________.

A．the

government

will

pay

for

the

delivery

of

newspaper

to

18-year-olds

B．the

government

will

buy

newspapers

for

18-year-olds

for

one

day

C．some

of

the

government

officials

are

against

the

plan

D．President

Nicolas

Sarkozy

would

like

to

help

the

government

解析：选A。细节理解题。由第三段的“.the

state

would

cover

the

cost

of

delivering

them

to

many

thousands

of

homes.”可知法国政府不是为18岁的青年买报纸，而是免费把报社提供的报纸送给年轻人。

3．What

is

people’s

reaction

to

the

plan

in

France?

A．They

think

it

a

waste

of

money.

B．They

will

buy

newspapers

themselves

for

18-year-olds.

C．They

think

highly

of

it

and

support

it.

D．They

are

worried

the

young

will

leave

the

Internet.

解析：选C。推理判断题。根据最后一段可知，人们认为政府的这项举措既能让年轻人对时事感兴趣，又能拯救报纸业。

4．Which

of

the

following

can

serve

as

the

best

title

for

the

passage?

A．A

Surprising

Plan

from

the

President

B．Help

Rescue

the

Newspaper

Industry

C．Form

the

Reading

Habit

for

the

Young

D．Free

Newspapers

Fly

to

Teens

解析：选D。主旨大意题。全文主要介绍了法国总统为挽救报纸行业，帮助年轻人养成看报的习惯而采取的一项措施。

B

Barack

Obama

is

the

nominee(被提名人)of

the

Democratic

Party

in

the

2008

presidential

election.He

is

the

first

African

American

President

of

the

United

States.Barack

Obama

was

born

on

August

4,1961

in

Honolulu，Hawaii，to

Barack

Obama

Senior

from

Kenya，and

Ann

Dunham，of

Kansas.His

parents

met

while

both

were

attending

the

University

of

Hawaii，where

his

father

was

admitted

as

a

foreign

student.They

separated

when

he

was

two

and

later

divorced.After

her

divorce，Dunham

married

Lolo

Soetoro，and

the

family

moved

to

Soetoro’s

home

country

of

Indonesia

in

1967，where

Obama

attended

local

schools

in

Jakarta

until

he

was

ten.He

then

returned

to

Honolulu

to

live

with

his

maternal

grandparents

while

attending

Punahou

School

from

the

fifth

grade

in

1971

until

his

graduation

from

high

school

in

1979.

Following

high

school，Obama

moved

to

Los

Angeles，where

he

studied

at

Occidental

College

for

two

years.He

then

moved

to

Columbia

University

in

New

York

City，where

he

majored

in

political

science.Obama

graduated

with

a

B．A.degree

from

Columbia

in

1983，then

worked

at

Business

International

Corporation

and

New

York

Public

Interest

Research

Group.

After

four

years

in

New

York

City，Obama

moved

to

Chicago

to

work

as

a

community

organizer

for

three

years

from

June

1985

to

May

1988

as

director

of

the

Developing

Communities

Project(DCP)．In

mid-1988，he

traveled

for

the

first

time

to

Europe

for

three

weeks

then

Kenya

for

five

weeks

where

he

met

many

of

his

Kenyan

relatives

for

the

first

time.

Obama

entered

Harvard

Law

School

in

late

1988

and

at

the

end

of

his

first

year

he

was

selected

as

an

editor

of

the

law

review

based

on

his

grades

and

a

writing

competition.In

his

second

year

he

was

elected

president

of

the

law

review，a

full-time

volunteer

position

working

as

editor-in-chief

and

supervising

the

law

review’s

staff

of

80

editors.Obama’s

election

in

February

1990

as

the

first

black

president

of

the

Harvard

Law

Review

was

widely

reported.He

graduated

from

Harvard

in

1991.

5．What

are

the

nationalities

of

Barack

Obama’s

natural

parents?

A．South

African

and

American.

B．Indonesian

and

American.

C．Kenyan

and

American.

D．Kenyan

and

Indonesian.

解析：选C。推理判断题。根据短文第一段可知，Barack

Obama的亲生父母是肯尼亚人和美国人，注意其生父Barack

Obama

Senior是肯尼亚人，当时是美国夏威夷大学的留学生；其母亲是美国堪萨斯州人。注意：其继父是印度尼西亚人。

6．How

long

did

Barack

Obama

stay

in

Indonesia?

A．About

4

years.

B．About

8

years.

C．About

10

years.

D．About

12

years.

解析：选A。细节理解题。根据第一段后半部分可知，他随继父Lolo

Soetoro和母亲一起于1967年去了继父的祖国印度尼西亚，于1971年返回美国檀香山和外祖父母一起生活并在那里继续上学，所以，Obama幼年在印度尼西亚度过了大约4年时间。

7.What’s

the

right

order

of

events

of

Obama?

a．Obama

got

his

first

B．A.degree

from

Columbia

University.

b．Obama

became

the

nominee

of

the

Democratic

Party

in

the

2008

presidential

election.

c．Obama

moved

to

Indonesia

with

his

mother

and

stepfather.

d．Obama

traveled

to

Kenya

for

five

weeks

and

met

his

relatives.

e．Obama

was

elected

President

of

the

Harvard

Law

Review.

A．a，c，b，e，d

B．d，a，c，e，b

C．c，a，b，e，d

D．c，a，d，e，b

解析：选D。细节理解题。根据短文内容，将所发生的事件标注时间，排序后可知D正确。事件abcde发生的时间分别是1983年，2008年，1967年，1988年，1990年。

5

用心

爱心

专心

篇3：人教课标版高中英语选修7 Unit 5 Travelling abroad（warming up and reading）教学设计方案

人教课标版高中英语选修7 Unit 5 Travelling abroad（warming up and reading）教学设计方案 本文关键词：选修，设计方案，人教，高中英语，课标

人教课标版高中英语选修7 Unit 5 Travelling abroad（warming up and reading）教学设计方案 本文简介：高二英语课堂教学设计方案（人教版高二选修7Unit5Travellingabroad第一课时warmingupandreading）江西省余江县第一中学金蓓蕾一、设计理念在21世纪的今天，世界变的越来越小了，我们有更多的机会到国外旅行和学习，旅游帮助我们了解不同的文化习俗，拓展我们的视野。到国外求学

人教课标版高中英语选修7 Unit 5 Travelling abroad（warming up and reading）教学设计方案 本文内容：

高二英语课堂教学设计方案

（人教版

高二选修7

Unit

5

Travelling

abroad

第一课时warming

up

and

reading）

江西省余江县第一中学

金蓓蕾

一、设计理念

在21世纪的今天，世界变的越来越小了，我们有更多的机会到国外旅行和学习，旅游帮助我们了解不同的文化习俗，拓展我们的视野。到国外求学的学子越来越多，这一多媒体课时能够充分调动学生的积极性，让学生在轻松愉快的氛围中感受主人公谢蕾的留学经历。

二、教学内容分析

该课是一堂阅读课。课文的中心话题是“出国学习或旅游”，课文始终围绕这一主题展开。热身（warming

up）部分设计了三个讨论题，帮助学生在大脑形成一个有关出国的信息包，使之对正文有初步的感知，为后续学习做准备。读前(pre-reading)设计了两个问题，第一个问题让学生思考留学前要考虑哪些问题，可以让学生展开思维，为文阅读做好知识上和心理上的铺垫。第二个问题要求学生预测主人公在英国留学可能遇到的困难和英国学习与中国学校学习的不同。阅读（reading）部分介绍了主人公谢蕾第一次去国外求学进预科班时所面临的问题，以及房东和导师对他的帮助，使她大胆正视困难，迎接挑战，最终树立了信心。

三、学生学习情况分析

本堂课的教学内容对于县城里高二的学生来说有一些学习障碍，比如说词汇、口语表达和背景知识等方面。所以在课前我主要布置的作业除了新词和课文的预习之外，还布置了学生做一些背景知识的搜寻工作，为学好该个话题课文做好更好的准备。

四、教学目标

1.

语言目标

（words

and

sentences）

a.

重点词汇和短语

1.

keep

it

up

2.

fit

in

3.

recommend

4.

get/be

used

to

5.

substitute

6.

acknowledge

7.

as

far

as

sb/sth

be

concerned

8.

feel/be

at

home

9.

be

occupied

with

b.

重点句式

1.

It

is

the

first

/second

….time

(that)

sb

have

/has

done

sth

(讲解句型）

It

was

the

first

/second

….time

(that)

sb

had

done

sth

2.

Living

with

host

families,in

which

there

may

be

other

college

students

gives

her

the

chance

to

learn

about

the

new

culture.(

讲解主语从句和非限定性定语从句）

2.

Ability

goals

Enable

the

students

to

talk

about

travelling

abroad

and

studying

abroad.

3.

Learning

ability

goals

Help

the

students

to

establish

national

consciousness

and

international

awareness.

Arouse

students’

interests

in

the

topic.

五、教学重点和难点

1.培养学生的听、说策略。

2.掌握与课文有关的词汇，表达法和句型，并运用到口头和书面表达中去。

六、教学过程设计

课件讲的是国外旅游和外国留学的话题。总共分6大环节：

Step1:

warming

up

也就是对文章的导入部分，设计几个简单问题如：

(1)

Have

you

ever

been

abroad?

(2)

Would

you

like

to

travel

abroad?

(3)

What

place

would

you

like

to

visit?

并插入一些旅游胜地的图片激起学生的兴趣。

Step2:

pre-reading

由国外旅游话题自然过渡到外国留学话题，让学生欣赏世界著名大学的图片，为阅读课做好铺垫。

设计两个问题，让学生进行头脑风暴。

1.What

should

we

take

into

account(考虑)

before

we

decide

to

study

abroad?

2.

Now

we

are

going

to

read

a

magazine

article

about

a

Chinese

student

who

is

studying

in

England.

What

do

you

think

she

will

find

different

from

studying

at

a

Chinese

school/

university?

What

do

you

think

she

might

find

difficult?

Step3:

reading

这一环节由两部分组成：fast

reading

和

detailed

reading

fasting

reading

要求学生快速浏览课文，掌握全文大意，并完成5个为课文设计的单选题和各段大意的配对练习。

1.Xie

Lei’s

purpose

of

going

to

London

is

A.

To

take

a

trip

B.

To

visit

her

friends

C.

To

get

a

business

qualification

D.To

look

for

a

new

job

2.Who

offered

help

to

Xie

Lei

when

she

was

in

England

according

to

the

passage?

A

.her

classmates

B.her

friends

C.

Her

tutor

and

host

family

D.her

parents

3.What

will

Xie

Lei

do

to

fit

in

well

according

to

the

passage

?

A.Try

to

avoid

missing

home

B.Take

part

in

more

social

activities

C.Make

some

new

friends

D.Spend

more

time

learning

4.which

of

the

following

can

be

used

to

describe

Xie

Lei?

A.Timid

B.Brave

C.Honest

D.Determined

5.What

is

the

main

idea

of

the

passage?

A

.It

talks

about

what

Xie

Lie

experiences

in

the

UK.

B

.It

talks

about

why

Xie

Lie

goes

abroad

.

C.

It

talks

about

what

Chinese

students

can

learn

in

the

UK.

D.

It

talks

about

why

Chinese

students

study

abroad.

Match

the

main

idea

with

each

paragraph.

P1

No.1

XieLei’s

preparation

year(一年预科)

P2

No.2

Benefits

of

her

preparation

course

P3

No.3

The

author’s

best

wish

for

XieLei

P4

No.4

Benefits

of

living

with

a

host

family

P5

No.5

Xie

Lei’s

new

plan

P6

No.6

Xie

Lei,a

Chinese

girl,came

to

study

in

London

P7

No.7

Xie

Lei’s

difficulty

getting

used

to

a

new

way

of

life

detailed

reading

要求学生再次细读课文，通过回答设置的3个具体问题，进一步的理解课文。

1.

why

is

Xie

Lei

doing

a

preparation

course

first?

2.

Why

did

Xie

Lie

feel

like

a

child

when

she

first

arrived

in

England?

3.

Why

has

Xie

Lei

decided

to

join

a

few

clubs

?

Step4:

discussion

1.

What

are

the

advantages

and

disadvantages

of

studying

abroad?

Discuss

in

groups,please.

这一环节的设计意图是给学生一个开放性的话题讨论，让学生开口说，即可练习口语，又可让学生参与到这一话题，活跃气氛。

Step5:

words

and

sentences

1.

Learn

the

new

words

and

important

sentences

on

the

blackboard.

1.

keep

it

up

2.

fit

in

3.

recommend

4.

get/be

used

to

5.

substitute

6.

acknowledge

7.

as

far

as

sb/sth

be

concerned

8.

feel/be

at

home

9.

be

occupied

with

10.

It

is

the

first

/second

….time

(that)

sb

have

/has

done

sth

(讲解句型）

It

was

the

first

/second

….time

(that)

sb

had

done

sth

11.

Living

with

host

families,in

which

there

may

be

other

college

students

gives

her

the

chance

to

learn

about

the

new

culture.(

讲解主语从句和非限定性定语从句）

2.

Complete

the

sentences

with

the

correct

phrases.

(The

phrases

have

been

referred

to

and

been

written

on

the

blackboard.)

这一环节的设计意图是让学生学习新的单词，词组及句型掌握课文重要的知识点，配备的习题也是为了让学生在具体语境中运用词语，学以致用。

Step6

Homework

1.

Review

the

whole

lesson.

2.

Read

the

passage

again

and

pick

out

the

sentences

containing

non-restrictive

attributive

clauses.

Step

7.

Evaluation

Ss

finish

the

following

evaluation

form.

Standard:

A,B,C

Contents

自评

他评

1.

I’m

active

in

talking

with

others.

2.

I’m

active

in

cooperating

with

others.

3.I

can

express

myself

fluently,accurately

and

appropriately.

4.

I

know

more

about

travelling

abroad

and

studying

abroad

after

this

lesson

5.

Do

you

think

you

need

to

improve

yourself

in

some

aspects？Which

aspects？

七、教学反思

本单元的中心话题是“出国学习或旅游”，语言知识和语言技能部分主要是围绕这一中心话题进行设计的。

READING

部分介绍了主人公谢蕾第一次去国外求学时所面临的问题，以及房东和导师对他的帮助，使她大胆正视困难，迎接挑战，最终树立了信心。

在教学过程中，要帮助学生树立国际意识，培养学生跨文化交际能力，培养学生坚强的意志，坚定克服困难，迎接挑战的决心。