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
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。