Unit
4
Space
Exploration
单元加餐练
Ⅰ.阅读理解
In
the
future
we
might
live
somewhere
other
than
Earth,
like
Mars.
Some
people
ask
how
this
will
be
possible.
Well,
Mars
is
in
fact
a
lot
the
same
as
the
earth.
The
days
are
almost
the
same
as
those
on
the
earth.
However,
the
two
planets
vary
in
temperature.
Since
there
is
mostly
carbon
dioxide
on
Mars,
it
would
be
quite
difficult
for
a
human
to
just
land
on
it.
So,
special
types
of
homes
and
space
suits
have
to
be
designed.
The
space
suits
should
be
almost
like
the
ones
astronauts
use
now,
and
except
that
they
have
to
be
warmer
so
that
the
astronauts
can
survive
the
cold
temperatures.
The
space
suits
must
also
be
able
to
withstand
(承受)
high
pressure
and
potentially
dangerous
radiation
that
can
kill.
The
houses
should
be
similar
to
our
homes
today
with
a
slight
difference.
All
of
the
houses
and
other
buildings
should
be
built
inside
a
large
dome
(圆顶状物)
or
bubble.
The
domes
should
be
made
out
of
glass,
and
would
also
be
able
to
prevent
radiation
from
affecting
the
people
inside.
The
domes
will
be
connected
to
a
machine
(like
plants
which
turn
carbon
dioxide
into
oxygen)．
With
Mars'
population
growing,
how
would
the
people
on
its
surface
get
fresh
food
and
water?
Just
like
humans
use
domes,
they
can
also
use
domes
to
grow
plants.
However,
the
domes
where
the
plants
are
grown
must
be
built
to
expand.
Once
we
upgrade
the
domes
to
a
larger
size
then
we
can
grow
more
food
by
cultivating
(种植)
more
plants.
To
get
the
food
or
dome
in
connection
with
other
domes,
there
will
be
long
narrow
tunnels
like
roads
that
connect
to
each
dome
separating
them
by
several
doors
so
that
the
pressure
in
each
dome
can
remain
the
same.
On
Mars,
so
many
other
things
are
available
to
us.
As
humans,
we
can
have
access
to
rare
and
fairly
expensive
metals
that
aren't
very
easy
to
get
hold
of
on
Earth,
and
a
colony
on
Mars
enhances
(提高)
our
chances
of
finding
these
metals.
So
when
someone
here
on
Earth
says
that
going
to
Mars
is
impossible,
please
tell
them
that
they'll
never
know
it
until
they
try
and
they
may
try
very
soon.
After
all
it's
our
future.
Why
not
make
it
on
Mars?
本文为说明文。文章介绍了目前人类对火星的探索。
1．It
is
difficult
for
humans
to
live
on
Mars
because
of
all
the
following
EXCEPT
________.
A．too
much
radiation
B．cold
temperature
C．lack
of
enough
oxygen
D．lack
of
houses
2．One
of
the
reasons
why
we
are
eager
to
explore
Mars
may
be
that
______.
A．we
can
find
rare
and
expensive
metals
there
easily
B．we'll
get
too
bored
to
live
on
the
earth
in
the
future
C．our
technology
will
become
much
advanced
D．we
want
to
know
more
about
the
unknown
world
3．What
is
the
author's
attitude
towards
living
on
Mars?
A．Pessimistic.
B．Uncertain.
C．Optimistic.
D．Opposed.
Ⅱ.七选五
Why
play
sports?
You
might
say
“to
get
exercise”
and
you'd
be
right.
To
have
fun?
That's
true,
too.
But
there's
more.
__1__
According
to
the
Women's
Sports
Foundation,
girls
who
play
sports
get
a
lot
more
than
just
fit.
Girls
who
play
sports
do
better
in
school.
You
might
think
that
athletics
will
take
up
all
your
study
time.
__2__
Exercise
improves
learning,
memory,
and
concentration,
which
can
give
active
girls
an
advantage
in
the
classroom.
Girls
who
play
sports
learn
teamwork
and
goal?setting
skills.
__3__
When
working
with
coaches,
trainers,
and
teammates
to
win
games
and
achieve
goals,
you're
learning
how
to
be
successful.
Those
skills
will
serve
you
well
at
work
and
in
family
life.
Sports
are
good
for
a
girl's
health.
In
addition
to
being
fit
and
keeping
a
healthy
weight,
girls
who
play
sports
are
also
less
likely
to
smoke.
And
later
in
life,
girls
who
exercise
are
less
likely
to
get
breast
cancer
or
osteoporosis
(骨质疏松症)．
Playing
sports
improves
self?confidence.
__4__
Why?
It
builds
confidence
when
you
know
you
can
practice,
improve,
and
achieve
your
goals.
Sports
are
also
a
feel?good
activity
because
they
help
girls
get
in
shape,
keep
a
healthy
weight,
and
make
new
friends.
__5__
Playing
sports
can
reduce
stress
and
help
you
feel
a
little
happier.
How?
The
brain
chemicals
released
during
exercise
improve
a
person's
mood.
Friends
are
another
mood?lifter.
And
being
in
a
team
creates
tight
bonds
between
friends.
It's
good
to
know
your
teammates
will
support
you—both
on
and
off
the
field!
A．Exercise
cuts
the
pressure.
B．Sports
teach
valuable
life
skills.
C．Regular
exercise
increases
quality
of
life.
D．In
fact,
there
are
at
least
five
more
reasons.
E．Girls
who
play
sports
feel
better
about
themselves.
F．Playing
sports
offers
children
more
than
just
physical
benefits.
G．But
research
shows
that
girls
who
play
sports
do
better
in
school
than
those
who
don't.
Ⅲ.完形填空
MacArthur's
love
for
sailing
dates
back
to
when
she
was
just
4
years
old,
when
she
first
got
the
opportunity
to
have
a
try
on
a
boat.
“It
kind
of
__1__
me
that
this
boat
had
everything
we
needed
to
take
us
anywhere
in
the
world.
And
as
a
child，that
opened
up
everything
and
made
me
feel
the
greatest
sense
of
__2__，”
she
explained.
This
experience
__3__
a
passion
within
MacArthur
that
she
wanted
to
sail
around
the
world.
Growing
up
in
the
countryside.
she
had
no
idea
how
to
__4__
it.
However,
she
knew
that
was
what
she
wanted
to
do
at
some
stage.
So
she
acquired
knowledge
and
__5__
for
years
to
seek
her
dream
in
sailing.
Having
merely
potatoes
and
beans
every
day
for
eight
years,
she
__6__
could
afford
the
right
equipment.
By
reaching
such
__7__
goals
and
asking
technical
questions
about
__8__，
MacArthur
felt
as
though
she
was
getting
__9__
to
her
ambition.
“The
impossible
could
be
possible
and
__10__
high
is
not
necessarily
such
a
crazy
thing
to
do.”
she
said.
And
it
seems
that
MacArthur's
__11__
to
become
a
sailor
went
beyond
her
expectations.
At
the
age
of
24,
she
started
to
__12__
media
attention
after
winning
the
second
place
in
the
Vendee
Globe,
a
single?handed
non?stop
yacht
(帆船)
race
that
went
around
the
world.
Four
years
later,
MacArthur
chose
to
sail
for
71
days
and
14
hours,
__13__
more
than
26,000
miles.
This
led
to
her
scoring
a
new
record.
__14__
this
record
has
since
been
surpassed
(超过)，MacArthur
is
still
considered
as
Britain's
most
successful
offshore
racer.
So
when
you
know
where
you're
going,
you
can
actually
get
there—even
if
it
seems
__15__！
本文为传记类记叙文。4岁时候的一次航海经历点燃了麦克阿瑟想环游世界的激情，她最终实现了梦想，把不可能变成了可能。
1．A.benefited
B．struck
C．taught
D．treated
2．A.wonder
B．magic
C．direction
D．freedom
3．A.lighted
B．left
C．carried
D．invented
4．A.approach
B．gain
C．achieve
D．forget
5．A.made
up
B．saved
up
C．turned
up
D．picked
up
6．A.eventually
B．fortunately
C．gradually
D．definitely
7．A.personal
B．financial
C．final
D．academic
8．A.school
B．sailing
C．driving
D．business
9．A.further
B．deeper
C．closer
D．smarter
10．A.working
B．designing
C．meaning
D．aiming
11．A.lesson
B．mind
C．confidence
D．plan
12．A.accept
B．receive
C．enjoy
D．keep
13．A.including
B．reaching
C．covering
D．floating
14．A.After
B．When
C．Whether
D．While
15．A.impossible
B．constant
C．valuable
D．available
Ⅳ.概要写作
阅读下面短文，根据其内容写一篇60词左右的内容概要。
Although
some
people
don't
like
using
automatic
hand
dryers
in
restrooms,
it
may
actually
be
argued
that
motion?sensing
hand
dryers
are
a
practical
alternative
to
paper
towels.
I
believe
that
our
school
would
benefit
from
investing
in
automatic
hand
dryers
in
all
the
restrooms.
First
of
all,
the
automatic
hand
dryer
is
very
sanitary
(卫生的).
Instead
of
pulling
on
a
lever
(手柄)
touched
by
a
large
number
of
students,
users
can
just
stick
their
hands
under
the
air
dryer.
No
bacteria
can
get
on
them
because
there
is
nothing
to
touch.
Kids
wouldn't
get
sick
from
the
paper
towel
dispensers
(纸巾盒)．
In
addition,
if
the
school
buys
automatic
hand
dryers,
we
can
save
money.
There
is
a
terrible
waste
of
paper
towels
in
the
restrooms.
Students
continuously
pull
on
the
lever
for
unneeded
towels
until
the
dispensers
are
empty.
An
automatic
hand
dryer
costs
about
$500,
with
very
little
additional
cost
over
time
while
paper
towels
can
cost
$25
a
case,
or
about
$500
a
year.
After
just
one
year,
it
would
pay
for
itself.
Finally,
our
bathroom
is
a
paper
towel
mess!
There
are
always
piles
of
paper
towels
on
the
floor.
Sometimes
the
extras
fall
from
the
dispenser
unused.
Many
times
kids
make
their
used
towel
into
a
ball
and
aim
for
a
basket.
But
if
they
miss
the
target,
the
paper
ball
stays
on
the
floor.
Paper
towels
leave
so
much
litter
in
the
restrooms
that
the
restrooms
are
a
mess.
People
use
the
hand
dryers
for
just
a
few
seconds,
and
they
think
that
automatic
hand
dryers
don't
dry
their
hands
as
thoroughly
as
paper
towels.
However,
studies
have
shown
that
when
people
dry
their
hands
for
at
least
30
seconds,
automatic
dryers
actually
dry
much
better
than
paper
towels.
It
is
difficult
to
get
every
part
of
your
hand
dry
using
paper
towels,
but
the
air
can
if
you
take
a
few
extra
seconds.
As
you
see
there
are
some
good
points,
let's
install
automatic
hand
dryers
as
soon
as
possible!
PAGEUnit
4
Space
Exploration
单元加餐练
Ⅰ.阅读理解
In
the
future
we
might
live
somewhere
other
than
Earth,
like
Mars.
Some
people
ask
how
this
will
be
possible.
Well,
Mars
is
in
fact
a
lot
the
same
as
the
earth.
The
days
are
almost
the
same
as
those
on
the
earth.
However,
the
two
planets
vary
in
temperature.
Since
there
is
mostly
carbon
dioxide
on
Mars,
it
would
be
quite
difficult
for
a
human
to
just
land
on
it.
So,
special
types
of
homes
and
space
suits
have
to
be
designed.
The
space
suits
should
be
almost
like
the
ones
astronauts
use
now,
and
except
that
they
have
to
be
warmer
so
that
the
astronauts
can
survive
the
cold
temperatures.
The
space
suits
must
also
be
able
to
withstand
(承受)
high
pressure
and
potentially
dangerous
radiation
that
can
kill.
The
houses
should
be
similar
to
our
homes
today
with
a
slight
difference.
All
of
the
houses
and
other
buildings
should
be
built
inside
a
large
dome
(圆顶状物)
or
bubble.
The
domes
should
be
made
out
of
glass,
and
would
also
be
able
to
prevent
radiation
from
affecting
the
people
inside.
The
domes
will
be
connected
to
a
machine
(like
plants
which
turn
carbon
dioxide
into
oxygen)．
With
Mars'
population
growing,
how
would
the
people
on
its
surface
get
fresh
food
and
water?
Just
like
humans
use
domes,
they
can
also
use
domes
to
grow
plants.
However,
the
domes
where
the
plants
are
grown
must
be
built
to
expand.
Once
we
upgrade
the
domes
to
a
larger
size
then
we
can
grow
more
food
by
cultivating
(种植)
more
plants.
To
get
the
food
or
dome
in
connection
with
other
domes,
there
will
be
long
narrow
tunnels
like
roads
that
connect
to
each
dome
separating
them
by
several
doors
so
that
the
pressure
in
each
dome
can
remain
the
same.
On
Mars,
so
many
other
things
are
available
to
us.
As
humans,
we
can
have
access
to
rare
and
fairly
expensive
metals
that
aren't
very
easy
to
get
hold
of
on
Earth,
and
a
colony
on
Mars
enhances
(提高)
our
chances
of
finding
these
metals.
So
when
someone
here
on
Earth
says
that
going
to
Mars
is
impossible,
please
tell
them
that
they'll
never
know
it
until
they
try
and
they
may
try
very
soon.
After
all
it's
our
future.
Why
not
make
it
on
Mars?
本文为说明文。文章介绍了目前人类对火星的探索。
1．It
is
difficult
for
humans
to
live
on
Mars
because
of
all
the
following
EXCEPT
________.
A．too
much
radiation
B．cold
temperature
C．lack
of
enough
oxygen
D．lack
of
houses
答案：D
解析：细节理解题。根据第二段的描述可知，火星上大部分是二氧化碳、天气也极其寒冷、气压很高、还存在可能致命的危险辐射，这些都是人类很难在火星上生活的原因。唯独没有提到“房屋的缺少”的问题。故D选项正确。
2．One
of
the
reasons
why
we
are
eager
to
explore
Mars
may
be
that
______.
A．we
can
find
rare
and
expensive
metals
there
easily
B．we'll
get
too
bored
to
live
on
the
earth
in
the
future
C．our
technology
will
become
much
advanced
D．we
want
to
know
more
about
the
unknown
world
答案：A
解析：细节理解题。根据最后一段中的As
humans,
we
can
have
access
to
rare
and
fairly
expensive
metals
that
aren't
very
easy
to
get
hold
of
on
Earth,
and
a
colony
on
Mars
enhances
(提高)
our
chances
of
finding
these
metals.(作为人类，我们可以获得稀有且相当昂贵的金属，而这些金属在地球上并不容易获得，而在火星上的殖民地增加了我们找到这些金属的机会)可知，我们渴望探索火星的原因之一可能是我们可以很容易地在那里找到稀有和昂贵的金属。故A选项正确。
3．What
is
the
author's
attitude
towards
living
on
Mars?
A．Pessimistic.
B．Uncertain.
C．Optimistic.
D．Opposed.
答案：C
解析：观点态度题。根据最后一段中的So
when
someone
here
on
Earth
says
that
going
to
Mars
is
impossible,
please
tell
them
that
they'll
never
know
it
until
they
try
and
they
may
try
very
soon.
After
all
it's
our
future.
Why
not
make
it
on
Mars?
(所以当地球上有人说去火星是不可能的，请告诉他们，他们永远不会知道，直到他们尝试，他们可能很快就会尝试。毕竟这是我们的未来。为什么不在火星上创造呢？)可知，作者对在火星上居住的想法是乐观的。故C选项正确。
Ⅱ.七选五
Why
play
sports?
You
might
say
“to
get
exercise”
and
you'd
be
right.
To
have
fun?
That's
true,
too.
But
there's
more.
__1__
According
to
the
Women's
Sports
Foundation,
girls
who
play
sports
get
a
lot
more
than
just
fit.
Girls
who
play
sports
do
better
in
school.
You
might
think
that
athletics
will
take
up
all
your
study
time.
__2__
Exercise
improves
learning,
memory,
and
concentration,
which
can
give
active
girls
an
advantage
in
the
classroom.
Girls
who
play
sports
learn
teamwork
and
goal?setting
skills.
__3__
When
working
with
coaches,
trainers,
and
teammates
to
win
games
and
achieve
goals,
you're
learning
how
to
be
successful.
Those
skills
will
serve
you
well
at
work
and
in
family
life.
Sports
are
good
for
a
girl's
health.
In
addition
to
being
fit
and
keeping
a
healthy
weight,
girls
who
play
sports
are
also
less
likely
to
smoke.
And
later
in
life,
girls
who
exercise
are
less
likely
to
get
breast
cancer
or
osteoporosis
(骨质疏松症)．
Playing
sports
improves
self?confidence.
__4__
Why?
It
builds
confidence
when
you
know
you
can
practice,
improve,
and
achieve
your
goals.
Sports
are
also
a
feel?good
activity
because
they
help
girls
get
in
shape,
keep
a
healthy
weight,
and
make
new
friends.
__5__
Playing
sports
can
reduce
stress
and
help
you
feel
a
little
happier.
How?
The
brain
chemicals
released
during
exercise
improve
a
person's
mood.
Friends
are
another
mood?lifter.
And
being
in
a
team
creates
tight
bonds
between
friends.
It's
good
to
know
your
teammates
will
support
you—both
on
and
off
the
field!
A．Exercise
cuts
the
pressure.
B．Sports
teach
valuable
life
skills.
C．Regular
exercise
increases
quality
of
life.
D．In
fact,
there
are
at
least
five
more
reasons.
E．Girls
who
play
sports
feel
better
about
themselves.
F．Playing
sports
offers
children
more
than
just
physical
benefits.
G．But
research
shows
that
girls
who
play
sports
do
better
in
school
than
those
who
don't.
本文讲述女孩为什么要进行体育锻炼。体育锻炼益处多多。喜欢运动，身体棒棒，远离疾病。
1．D 解析：根据上句“但原因有更多”可知D项In
fact,
there
are
at
least
five
more
reasons.(事实上至少有五种理由。)符合题意，故选D。
2．G 解析：根据空格前一句“你可能认为在学校里锻炼会占用学习时间”可知此空要表达的意思是：但研究表明，参加体育运动的女孩在学校比那些不运动的女孩有更优秀的表现。故选G。
3．B 解析：根据空格下一句“在你和教练、训练导师以及队员一起合作努力赢得比赛和实现目标的过程中，你会学会如何获得成功”可知此空的意思是：体育运动可以教会你宝贵的生活技巧。故选B。
4．E 解析：根据空格前“运动能够提升自信”。可知此空的意思是：运动的女孩会自我感觉更加良好。故选E。
5．A 解析：根据空格下一句“运动能减少压力，帮助你更开心”可知此空的意思是：锻炼能减少压力。故选A。
Ⅲ.完形填空
MacArthur's
love
for
sailing
dates
back
to
when
she
was
just
4
years
old,
when
she
first
got
the
opportunity
to
have
a
try
on
a
boat.
“It
kind
of
__1__
me
that
this
boat
had
everything
we
needed
to
take
us
anywhere
in
the
world.
And
as
a
child，that
opened
up
everything
and
made
me
feel
the
greatest
sense
of
__2__，”
she
explained.
This
experience
__3__
a
passion
within
MacArthur
that
she
wanted
to
sail
around
the
world.
Growing
up
in
the
countryside.
she
had
no
idea
how
to
__4__
it.
However,
she
knew
that
was
what
she
wanted
to
do
at
some
stage.
So
she
acquired
knowledge
and
__5__
for
years
to
seek
her
dream
in
sailing.
Having
merely
potatoes
and
beans
every
day
for
eight
years,
she
__6__
could
afford
the
right
equipment.
By
reaching
such
__7__
goals
and
asking
technical
questions
about
__8__，
MacArthur
felt
as
though
she
was
getting
__9__
to
her
ambition.
“The
impossible
could
be
possible
and
__10__
high
is
not
necessarily
such
a
crazy
thing
to
do.”
she
said.
And
it
seems
that
MacArthur's
__11__
to
become
a
sailor
went
beyond
her
expectations.
At
the
age
of
24,
she
started
to
__12__
media
attention
after
winning
the
second
place
in
the
Vendee
Globe,
a
single?handed
non?stop
yacht
(帆船)
race
that
went
around
the
world.
Four
years
later,
MacArthur
chose
to
sail
for
71
days
and
14
hours,
__13__
more
than
26,000
miles.
This
led
to
her
scoring
a
new
record.
__14__
this
record
has
since
been
surpassed
(超过)，MacArthur
is
still
considered
as
Britain's
most
successful
offshore
racer.
So
when
you
know
where
you're
going,
you
can
actually
get
there—even
if
it
seems
__15__！
本文为传记类记叙文。4岁时候的一次航海经历点燃了麦克阿瑟想环游世界的激情，她最终实现了梦想，把不可能变成了可能。
1．A.benefited
B．struck
C．taught
D．treated
答案：B
解析：考查固定短语搭配。句意：我突然想到，这艘船拥有带我们到世界任何地方所需要的一切。It
strikes/struck
sb.
that...
为固定句型，意为“某人突然想到某事”，故选B。
2．A.wonder
B．magic
C．direction
D．freedom
答案：D
解析：考查名词词义辨析。A.wonder奇迹；B.magic魔术；C.direction
方向；D.freedom自由。这一切让McArthur开阔了眼界，感受到了极大的自由感。故选D。
3．A.lighted
B．left
C．carried
D．invented
答案：A
解析：考查动词词义辨析。A.lighted点燃；B.left离开；C.carried携带；D.invented发明。这次经历点燃了她想环游世界的激情。故选A。
4．A.approach
B．gain
C．achieve
D．forget
答案：C
解析：考查动词词义辨析。A.approach接近；B.gain获得；C.achieve
达到；D.forget忘记。她想要环游世界，从小长在乡下的她不知道如何做到这一点。故选C。
5．A.made
up
B．saved
up
C．turned
up
D．picked
up
答案：B
解析：考查动词短语辨析。A.made
up编造；B.saved
up积攒；C.turned
up出现；D.picked
up捡起。她为此获取知识，积蓄了多年。故选B。
6．A.eventually
B．fortunately
C．gradually
D．definitely
答案：A
解析：考查副词词义辨析。A.eventually最终；B.fortunately幸运地；C.gradually逐渐地；D.definitely明确地。省吃俭用很多年，她终于买了装备。故选A。
7．A.personal
B．financial
C．final
D．academic
答案：B
解析：考查形容词词义辨析。A.personal个人的；B.financial经济的；C.final最终；D.academic学术的。八年简朴的生活，只吃豆类和土豆，她终于攒够了钱购买合适的装备。所以是实现了经济性的目标。故选B。
8．A.school
B．sailing
C．driving
D．business
答案：B
解析：考查名词词义辨析。A.school上学；B.sailing航海；C.driving
开车；D.business生意。这里指做好经济上的和关于航海知识上的储备，McArthur
想要航海，所以此处是询问航海技术问题。故选B。
9．A.further
B．deeper
C．closer
D．smarter
答案：C
解析：考查形容词词义辨析。A.further远离；B.deeper更深；C.closer更近；D.smarter更聪明。麦克阿瑟觉得她离自己的追求越来越近了。故选C。
10．A.working
B．designing
C．meaning
D．aiming
答案：D
解析：考查动名词词义辨析。A.working工作；B.designing设计；C.meaning
意味着；D.aiming
目标是。句意：不可能的事也可能发生，把目标定得高并不一定是一件疯狂的事情。小时候想要环游世界的梦想对她来说是一件目标很高的事情。故选D。
11．A.lesson
B．mind
C．confidence
D．plan
答案：D
解析：考查名词词义辨析。A.lesson教训；B.mind主意；C.confidence
自信；D.plan计划。麦克阿瑟想成为一名航海员的计划似乎超出了她的预期。故选D。
12．A.accept
B．receive
C．enjoy
D．keep
答案：B
解析：考查动词词义辨析。A.accept接受；B.receive获得；C.enjoy
欣赏；D.keep保持。她开始受到媒体的关注，故选B。
13．A.including
B．reaching
C．covering
D．floating
答案：C
解析：考查动词词义辨析。A.including包括；B.reaching达到；C.covering覆盖；行走(一段路程)；D.floating漂浮。四年后，麦克阿瑟选择航行71天14小时，航程超过26
000英里。故选C。
14．A.After
B．When
C．Whether
D．While
答案：D
解析：考查连词词义辨析。句意：尽管这一纪录已经被打破，麦克阿瑟仍然被认为是英国最成功的海上赛手。故选D。
15．A.impossible
B．constant
C．valuable
D．available
答案：A
解析：考查形容词词义辨析。A.impossible不可能；B.constant经常的；C.valuable有价值的；D.available可获得的。句意：所以当你知道你要去哪里的时候，你就能到达那里，即使这看起来是不可能的！故选A。
Ⅳ.概要写作
阅读下面短文，根据其内容写一篇60词左右的内容概要。
Although
some
people
don't
like
using
automatic
hand
dryers
in
restrooms,
it
may
actually
be
argued
that
motion?sensing
hand
dryers
are
a
practical
alternative
to
paper
towels.
I
believe
that
our
school
would
benefit
from
investing
in
automatic
hand
dryers
in
all
the
restrooms.
First
of
all,
the
automatic
hand
dryer
is
very
sanitary
(卫生的).
Instead
of
pulling
on
a
lever
(手柄)
touched
by
a
large
number
of
students,
users
can
just
stick
their
hands
under
the
air
dryer.
No
bacteria
can
get
on
them
because
there
is
nothing
to
touch.
Kids
wouldn't
get
sick
from
the
paper
towel
dispensers
(纸巾盒)．
In
addition,
if
the
school
buys
automatic
hand
dryers,
we
can
save
money.
There
is
a
terrible
waste
of
paper
towels
in
the
restrooms.
Students
continuously
pull
on
the
lever
for
unneeded
towels
until
the
dispensers
are
empty.
An
automatic
hand
dryer
costs
about
$500,
with
very
little
additional
cost
over
time
while
paper
towels
can
cost
$25
a
case,
or
about
$500
a
year.
After
just
one
year,
it
would
pay
for
itself.
Finally,
our
bathroom
is
a
paper
towel
mess!
There
are
always
piles
of
paper
towels
on
the
floor.
Sometimes
the
extras
fall
from
the
dispenser
unused.
Many
times
kids
make
their
used
towel
into
a
ball
and
aim
for
a
basket.
But
if
they
miss
the
target,
the
paper
ball
stays
on
the
floor.
Paper
towels
leave
so
much
litter
in
the
restrooms
that
the
restrooms
are
a
mess.
People
use
the
hand
dryers
for
just
a
few
seconds,
and
they
think
that
automatic
hand
dryers
don't
dry
their
hands
as
thoroughly
as
paper
towels.
However,
studies
have
shown
that
when
people
dry
their
hands
for
at
least
30
seconds,
automatic
dryers
actually
dry
much
better
than
paper
towels.
It
is
difficult
to
get
every
part
of
your
hand
dry
using
paper
towels,
but
the
air
can
if
you
take
a
few
extra
seconds.
As
you
see
there
are
some
good
points,
let's
install
automatic
hand
dryers
as
soon
as
possible!
Compared
with
paper
towels,
hand
dryers
have
more
advantages,
which
will
benefit
school
in
four
ways.(要点1)
First,
they
are
clean
and
healthy
because
bacteria
can't
touch
kids.(要点2)
Additionally,
it
can
help
school
save
money.
Thirdly,
our
bathroom
can
be
kept
clean
and
neat.
Besides,
it
can
dry
our
hands
more
effectively
if
we
take
longer
time.(要点3)
Therefore,
school
is
advisable
to
fix
the
equipment
at
once.(要点4)
PAGE
