题目列表(包括答案和解析)
Basketball stars are usually tall．The stars of other sports are sometimes short．Some of the best football players are not very tall．
Short people often have better balance than tall people, so they do not fall over（摔倒）very often．In some sports the players must have good balance, for example, table tennis and running．
You do not need long legs to run fast! Some of the fastest runners in the world are not very tall．Some are tall and some are short．There is no medicine to make people grow taller or to make people shorter．
The tallest woman in the world is Sandy Allen．She is 2．317 meters tall and lives in the United States．
The shortest person in the world is Gul Mohammed from India．He is only 57 centimeters （厘米）tall．
Today young people in many countries grow taller than their parents．This is because they eat better food today．Good food can help children grow．
根据短文内容，回答下列问题：
1．How many different sports do we talk about in this passage （段落）? What are they?
____________________________________________________________．
2．Is there any medicine to make people grow taller or to make people shorter?
____________________________________________________________．
根据短文内容，补全下列句子（每空填一个单词或数字）：
3．The tallest person in the world is ________ meters taller than the shortest one．
4．_______ _______ helps young people today grow taller than their parents．
5．将短文中划线的句子译成汉语：
___________________________________________________________．
用括号里所给动词的适当形式填空。
It is said that walking under a ladder means bad luck, and it's the same with black cats．People 1 (say)if a black cat crosses before you, it 2 (bring)you bad luck, too．But I didn't think so until I heard my student Sam's story this afternoon．Ever since then, I 3 (begin)thinking about whether it is true．
This afternoon, Sam walked down the street thinking about when 4 (hold)a party for his girlfriend, so he didn't notice where he was going．When he 5 (walk)right under a ladder standing against a building, a black cat ran out of a door, which surprised him and made him 6 (fall)over．His head hit the ladder．The man who was cleaning the window at the top of the ladder fell down, and the dirty water 7 (go)down through the air．Poor Sam!He got wet all over．
1．________ 2．________ 3．________ 4．________
5．________ 6．________ 7．________
Every object has weight. But the center of its weight is not always in the middle of the object. If the top of an object is heavier than its bottom, it will fall over easily. We say that its center of gravity is high. But if the bottom is heavier, it won’t fall easily. Then we say that its center of gravity is low.
Look at the first picture. This empty box must fall over, because its center of gravity (C) is not above the line of its bottom (AB).
Now look at the second picture. There is some heavy iron in the bottom of this box. It will not fall, because its center of gravity is above its bottom.
【小题1】If the bottom of an object is ______ its top, it will fall over easily.
| A．lighter than | B．heavier than | C．no heavier than | D．as heavy as |
| A．why things fall over | B．a low center of gravity |
| C．a high center of gravity | D．that everything has weight |
As we all know, the ocean moves. But waves breaking on the beach make the ocean fun. When you stand on the shore and look at the waves, it seems like the water is moving towards you. But the water is not really moving forward. The moving you see is wave energy. And wave energy comes from the wind.
Let’s think about how this works. As wave energy passes through the water, the energy makes particles （粒子） of water move up and down. Just give you an example of a wave passing under a basketball. We put a basketball on the sea. When the wind blows, a wave comes from behind the basketball. The basketball moves up to the top with the wave. Then the wave continues and leaves the basketball behind. The basketball looks lower, but it doesn’t move forward. That’s because the wave energy just moves the water which is under the basketball.
So why can you see a wave knock you down on the shore？When a wave moves toward the shore, the bottom of the wave slows down because it meets the ocean floor. But the top, which is called crest(浪峰), keeps moving. The different action causes the wave to fall over or break onto the shore. If a wave is very large, it carries a lot of energy when it hits the land. As time goes by, waves can break up and carry away the rocks and other things on the shore. Shorelines are changing all the time because of wave action.
1.______ is really moving forward when you look at the wave.
A．Water B．The basketball C．Water and wave energy D．Wave energy
2.Match the sentences with the pictures and the right answer.
(1) The basketball moves up to the top with the wave.
(2) The basketball continues and leaves the basketball behind.
(3) When the wind blows, a wave comes from behind the basketball.
A．a—(2) b—(1) c—(3) B．a—(3) b—(1) c—(2)
C．a—(1) b—(3) c—(2) D．a—(3) b—(2) c—(1)
3.Which of the following is NOT true according to the passage?
A．Wave energy comes from the water.
B．Large waves carry plenty of energy.
C．Wave action makes shorelines change all the time.
D．The bottom of the wave is easy to slow down.
4.The underlined word “it” ( Paragraph 3) refers to “________”.
A．particles of water B．the shore C．the wind D．the bottom of the wave
5.The main idea of this passage is ______.
A．what makes particles of water move B．how a basketball moves on the ocean
C．how wave energy causes wave action D．why a wave can knock you down
As we all know, the ocean moves. But waves breaking on the beach make the ocean fun. When you stand on the shore and look at the waves, it seems like the water is moving towards you. But the water is not really moving forward. The moving you see is wave energy. And wave energy comes from the wind.
Let’s think about how this works. As wave energy passes through the water, the energy makes particles （粒子） of water move up and down. Just give you an example of a wave passing under a basketball. We put a basketball on the sea. When the wind blows, a wave comes from behind the basketball. The basketball moves up to the top with the wave. Then the wave continues and leaves the basketball behind. The basketball looks lower, but it doesn’t move forward. That’s because the wave energy just moves the water which is under the basketball.
So why can you see a wave knock you down on the shore？When a wave moves toward the shore, the bottom of the wave slows down because it meets the ocean floor. But the top, which is called crest(浪峰), keeps moving. The different action causes the wave to fall over or break onto the shore. If a wave is very large, it carries a lot of energy when it hits the land. As time goes by, waves can break up and carry away the rocks and other things on the shore. Shorelines are changing all the time because of wave action.
【小题1】______ is really moving forward when you look at the wave.
| A．Water | B．The basketball | C．Water and wave energy | D．Wave energy |
| A．a—(2) b—(1) c—(3) | B．a—(3) b—(1) c—(2) |
| C．a—(1) b—(3) c—(2) | D．a—(3) b—(2) c—(1) |
| A．Wave energy comes from the water. |
| B．Large waves carry plenty of energy. |
| C．Wave action makes shorelines change all the time. |
| D．The bottom of the wave is easy to slow down. |
| A．particles of water | B．the shore | C．the wind | D．the bottom of the wave |
| A．what makes particles of water move | B．how a basketball moves on the ocean |
| C．how wave energy causes wave action | D．why a wave can knock you down |
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