Displays of the aurora borealis, or "northern lights," can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles, induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.


to affect the trajectories of ballistic missiles, induce

that the trajectories of ballistic missiles are affected, induce

that it affects the trajectories of ballistic missiles, induces

that the trajectories of missiles are affected and induces

to affect the trajectories of ballistic missiles and induce

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考题讲解

题目分析：
略

选项分析：

A选项：影响弹道（affect the trajectories of ballistic missiles）和引发电流（induce electric currents）应该是大气做的在逻辑上等价的两件事，这两件事应该保持平行，即，“to affect和to induce”或“affect和induce”。

B选项：affect和induce平行错误同(A)；从句that the trajectories of ballistic missiles are affected需改为不定式短语to affect the trajectories of ballistic missiles，这点考查了不定式和从句的区别。用之于本题，变化部分是heat句的状语。主句“北极光加热大气”这一事件的发生显然会直接影响“影响弹道（affect the trajectories of ballistic missiles）和引发电流（induce electric currents）”这两个事件的发生与否。

C选项：affect和induce平行错误同(A)；从句that the trajectories of ballistic missiles are affected需改为不定式短语to affect the trajectories of ballistic missiles错误同选项(B)。

D选项：从句that the trajectories of ballistic missiles are affected需改为不定式短语to affect the trajectories of ballistic missiles错误同选项(B)。

E选项：Correct. 本选项在语法和逻辑上均是正确的。 

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Prep2012-SC
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