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精英家教網 > 初中英語 > 題目詳情
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.
小題1:______ is really moving forward when you look at the wave.
A．WaterB．The basketballC．Water and wave energyD．Wave energy
小題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)
小題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.
小題4:The underlined word “it” ( Paragraph 3) refers to “________”.
A．particles of waterB．the shoreC．the windD．the bottom of the wave
小題5:The main idea of this passage is ______.
A．what makes particles of water moveB．how a basketball moves on the ocean
C．how wave energy causes wave actionD．why a wave can knock you down

小題1:D
小題2:B
小題3:A
小題4:D
小題5:C

試題分析：這篇短文主要介紹了波浪的形成原理和其運動特點。
小題1:根據第一段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.描述，可知選D。
小題2:根據圖片可知風力來自左邊，結合短文第二段描述，可知搭配正確的一組是B。
小題3:根據And wave energy comes from the wind.描述，可知選A。
小題4:聯系前文描述，可知這個代詞指的是海浪的下部，故選D。
小題5:這篇短文主要介紹了波浪能是如何引起波浪作用的。故選C。
點評：本文中長句較多，一時很難讀懂句子含義，注意多讀幾遍，不要強求非得理解一詞一句的含義，能把握文章大意就行。然后帶著問題閱讀短文，一般就能順利找出答題依據。對于不能直接找到根據的問題注意聯系上下文，根據短文中心總結出正確答案。
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完形填空．
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