题目
题型:同步题难度:来源:
and valleys. It forms lakes and oceans. Water is everywhere.
Nature has a great water system (水系). Rainwater finds its way to streams (溪流) and rivers. Rivers
lead to the oceans. At the mouths of the rivers, fresh water (淡水) joins the salt water of the oceans.
Here at the mouth of a river there is much important plant and animal life. Pollution destroys (毁坏)
this life, so we have to clean our streams and rivers. Man has to work with nature-not against it.
B. rain
C. life
B. a stream
C. the mountains
B. mouth of a river
C. body of a stream
B. nature
C. oceans
B. Blood can be found in every living thing.
C. At the mouth of a river we can find many living things.
答案
核心考点
试题【阅读理解。 Water is the "life blood" of our earth. It is in every living thing. I】;主要考察你对科普环保类等知识点的理解。[详细]
举一反三
you laugh hard, tears will also come down from your eyes. But tears have a more important job than
showing your feelings.
Tears keep your eyes clean and healthy. They wash away dirt and germs (细菌) just like bath.
Your eyes also need tears to keep them wet. And eyes must be wet so that they can move smoothly.
Your eyes are busy looking here and there all day long. They move quickly from one thing to another.
If you didn"t have tears, your eyes couldn"t move, and soon you would be blind. Maybe you don"t like
tears, but your eyes can"t do without them.
B. why people have tears
C. why people cry when they are sad
D. what tears are
B. making your face clean
C. washing things from your eyes
D. making your eyes bright
B. laugh and cry
C. keep clean
D. show your feelings
B. wash away dirt and germs
C. have tears in your eyes
D. move your eyes quickly
B. your eyes like tears very much
C. your eyes can"t work without tears
D. your eyes can"t open without them
only about one in two hundred is affected (感染) in this matter. Perhaps, after all, it is safer to be driven
by a woman.
There are different kinds of color blindness. For example, a man cannot see deep red. He may think
that red, orange and yellow are all shades (影子)of green. Sometimes a person can"t tell the difference
between blue and green. Only a few unlucky men may see everything in shades of green-a strange world
indeed.
Color blindness in human beings is a difficult thing to explain. In only one eye there are millions of very
small things called "cones (锥状细胞)". These help us to see in the bright light and to tell differences
between colors. There are also millions of "rods ( 杆状细胞)", but these are used for seeing when it is
nearly dark. They show us shapes but not colors.
Some insects have favorite colors. Mosquitoes (蚊子) like blue but do not like yellow. A red light
will not attract insects, but a blue light will. Human beings also have favorite colors. Yet we are lucky.
With the help of the cones in our eyes, we can see many beautiful colors by day, and with the help of
the rods we can see shapes at night.
B. 无色
C. 色盲
D. 讨厌颜色
B. women are better at driving than men
C. women can see things more clearly
D. there are fewer color-blind women
B. kill insects
C. see in the dark
D. tell orange from yellow
B. yellow
C. blue
D. green
B. Not all of men have the same problem in recognizing colors.
C. None of men can tell the difference between blue and green.
D. All of men see everything in shades of green.
most of us like eating sweets and ice cream better than meat and rice. Sweets and ice cream are not bad
for us if we eat them at the end of a meal. If we eat them before a meal, they may take away our appetite(食欲). So the doctors suggest us we should have our meal regularly.
In old England, the judges usually asked the prisoners to eat bread without water. If they couldn"t
swallow(吞)the bread, it meant that they weren"t telling the truth. Though this seems strange and foolish,
they thought it was an excellent way of finding out the truth. A man who is worrying about something has
difficulties in swallowing dry bread, because he loses his appetite.
B. happier
C. more beautiful
B. before a meal
C. when we are hungry
B. at the same time
C. at any time
B. eat a lot of dry bread
C. hardly (几乎不) eat dry bread
B. shy
C. unhappy
This is an old English saying. Have you heard of it before? It means that we must go to bed early
and get up early in the morning. Then we shall be healthy. We shall also be rich (wealthy) and clever
(wise).
This is true. The body must have enough sleep to be healthy. Children of young age should have
ten hours" sleep every night. Children who do not have enough sleep cannot do their work very well.
They will not be wise and they may not become wealthy!
The body also needs exercise. Walking, running, jumping, swimming and playing games are all
exercise.
Exercise keeps the body strong. Exercise also helps the blood (血液) to move around inside the
body. This is very important. Our blood takes food to all parts of our body. The head also needs blood.
Exercise helps us to think better!
B. be healthy
C. think better
D. have strong blood
B. won"t do well in his work
C. goes to school in time
D. has enough sleep
B. he has a lot of homework to do
C. he is strong enough
D. he does exercise
B. blood
C. children
D. head
B. A student should have 10 hours" sleep.
C. It"s good for you to get up early and go to bed early.
D. If you have enough blood, you"ll be wise.
完形填空。 | |||
Suppose (假定) every person on the Earth ate only one kind of food. And maybe one year that food couldn"t __1__. If that happened, man would soon __2__. Luckily, man doesn"t __3__ that problem. But another animal may. The animal is the giant (巨大的) panda, one of the world"s most-loved animals. Dr. Thomas Soderstrom, a scientist, has __4__ for the first time that the bamboo (竹子) the giant pandas eat is dying. As a result, many of the pandas are also dying of being __5__. Scientists estimate (估计) that so far more than 140 giant pandas have died. This number may be __6__ one-quarter of the world"s giant panda population. Between 400 and 1000 giant pandas are __7__ to live in the mountains. Giant pandas were once more __8__all over many parts of Asia (亚洲). Now they are only in small parts of China. Can the wild pandas be __9__? The scientists want to find out more about the animals" food. They want to see whether the pandas are able to 10 their food while the bamboo is dying. | |||
( ) 1. A. found ( ) 2. A. break ( ) 3. A. want ( ) 4. A. found ( ) 5. A. cold ( ) 6. A. almost ( ) 7. A. thought ( ) 8. A. big ( ) 9. A. kept ( ) 10. A. have | B. be found B. live B. work B. invented B. tired B. already B. believed B. liked B. saved B. catch | C. founded C. die C. answer C. known C. hungry C. hardly C. seen C. interesting C. made C. change | D. be founded D. lose D. face D. studied D. ill D. really D. said D. common D. taken D. get |