It is doubtful that man will ever be able to control earthquakes and eliminate their destructiveness altogether, but as how and why earthquakes happen become better understood, man will become more and more able to deal with their potential devastation before they occur.
What does this element of the unknown mean
A) The fact that earthquakes can happen at any time or place.
B) The causes of the earthquakes.
C) The damages resulting from earthquakes.
D) The two earthquake zones.
文中指出:几个世纪以来,地震中的不可知成份使人们对地震感到更害怕、恐慌,但是最近研究表明人们有可能对地震进行预测。通过分析动物行为的改变、地壳运动的方式、重力和地球磁场的变化以及通过对小震频率的观测,使科学家在预测何时、何地发生地震方面的成功率越来越高。世界范围内地震警报系统已经开始运行,这样就使人们有可能为本来完全无法预料的地震提前做好准备,因而有可能减小地震造成的破坏。从第二、三句中可以得知 this element of the unknown 指的就是地震会在何时、何地发生,因而选A。
5)单句释义型
单句释义题主要考察考生能否根据文章上下文或文章主题来正确理解某一句子。这类句子通常有以下特点:
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