The passage cites "It’s like being blindfolded and walking toward the edge of a cliff," (Para.2) in order to show that_____. Ac

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问题 The passage cites "It’s like being blindfolded and walking toward the edge of a cliff," (Para.2) in order to show that_____.
According to the passage, over the past 110 000 years, world temperature      .

选项 A、has been keeping rising
B、has risen and fallen at regular intervals
C、has experienced no rapid and sudden changes
D、has experienced both smooth and abrupt changes

答案D

解析 细节题。第三段中讲到,研究人员利用从冰川和冰原钻取的冰芯,研究出一个模型,表明世界气温在过去的11万年间有升有降,而且频度不固定,所以A和B都与之不符合。在第四段中又讲,有些变化是缓慢、平稳的,而有些变化是突然的、出乎意料的,并用例子说明,所以C不符合,而D是符合的,故D是正确答案。
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