ANot long after Galileo’ s time, Sir Isaac Newton invented Banother kind of Telescope Cwhich he used mirrors Dinstead of lenses.

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问题 ANot long after Galileo’ s time, Sir Isaac Newton invented Banother kind of Telescope Cwhich he used mirrors Dinstead of lenses.

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答案C

解析 改为in which he used.,which引导的定语从句修饰telescope,表示telescope用到的材料,如果不加介词in,telescope做use的双宾语,与句意不符。
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