At each end of the tube______, one which gathers light and one which magnifies t

游客2023-10-15 8

问题 At each end of the tube______, one which gathers light and one which magnifies the image.

选项 A、are two lenses there
B、two lenses are
C、are two lenses
D、two lenses are there

答案 C

解析句意：在每个电子管的末端都有两个透镜，一个是用来聚光的，另一个是用来放大图像的。此句为倒装句，一些形容词、过去分词、介词短语等位于句首作表语，句子需要倒装。后半句作two lenses的同位语。

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