题目内容

20 America's 50th female astronaut is right now moving round the Earth
A Right
B Wrong
C Not mentioned

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34 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．

1 Why can't you stop your eternal complaining？
A long
B everlasting
C temporary
D boring

65 A another B each C other D every

33 Which of the following is NOT true of the scramjet engine？
A It has been used on passenger planes．
B The air it breathes does not put out the combustion flames．
C It works at speeds greater than five times the speed of sound．
D It goes as fast as a rocket．