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答题结果:0/6
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Question 1 of 6
What is the main purpose of the lecture?

A.

To help students understand what is required to launch a satellite

B.

To describe new materials now being used to explore space

C.

To describe a potential technology for space exploration

D.

To show how ideas from science fiction often develop into actual technologies

我的答案:

正确答案:C

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