Carbon dioxide.which makes a between us and the sun.prevents heat from getting out of the atmosphere easily.so the earth is becoming warmer．( )A．differenceB．comparisonC．connectionD．barrier 题目和参考答案——青夏教育精英家教网—

题目内容

13．Carbon dioxide，which makes a ______ between us and the sun，prevents heat from getting out of the atmosphere easily，so the earth is becoming warmer．（　　）

A．

difference

B．

comparison

C．

connection

D．

barrier

分析句意：二氧化碳是我们和太阳之间的屏障，它能阻止热量从大气中轻易的散发出去，因此地球变得更暖了．

解答答案D 考查名词词义．difference"差异，不同"；comparison"比较，比喻"；connection"连接，联系"； barrier"障碍，屏障"．D项符合句意．

点评要熟悉名词的意思，并学会跳过空格去揣摩题干的意义，将所给选项迅速带入句中并做出正确的选择．

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