大学英语大学英语大学英语六级(CET6)2003年6月大学英语六级考试试卷
题目内容

What do the two instruments mentioned in the second paragraph (Line 5) refer to、

2024-07-09

A.The astronomical telescope and the wave-front sensor.

B.The aluminum mirror and the laser beam.

C.The active mirror and the contact lens.

D.The aluminum mirror and the wave-front sensor.

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