【语篇解读】 本文描述地球变暖现象从科学的角度介绍了地球变暖的两个主要原因:一是二氧化碳排放的数量增加了;二是太阳活动频繁。指出我们无法控制太阳只能控制二氧化碳的排放来给地球降温。
What makes the earth become warmer and warmer?
A.Carbon dioxide.
B.The sun.
C.The air.
D.A and B
答案 D [细节理解题。由第一段的No doubt the tons of carbon dioxide being thrown up into the air are dangerously warming the earth.可知二氧化碳使地球变暖太阳活跃时地球就会升温。可知D选项正确。]
________than carbon dioxide in warming the earth.
A.more serious
B.more difficult
C.more terrible
D.more important
答案 D [细节理解题。由第二段的So some scientists said the sun's changeable moods may be more important than carbon dioxide in warming the earth.可知太阳比二氧化碳更能影响地球的温度可知D选项正确。]
A.We should try to change the sun's changeable moods.
B.We should control sending carbon dioxide into the air directly.
C.We should make some laws to prevent people from driving.
D.We should make the sun becomes more active.
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