单选题：What does Werner J. A. Dahm say about the Hyper-X test fligh

题目分类：理工类
题目类型：单选题
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题目内容：

What does Werner J. A. Dahm say about the Hyper-X test flight? A．It was unsuccessful because it lasted only 11 seconds.
B．It is a very important event in developing very fast airplanes.
C．It allows people to fly at an altitude of 100,000 feet.
D．It can transport cargo quickly and cheaply to outer space.

参考答案：

答案解析：

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分类：理工类题型：单选题