What does Werner J．A．Dahm say about the Hyper-X test flight、

试卷相关题目

• 1Which 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．

  开始考试点击查看答案
• 2What kind of engine did the Hyper-X use、

  A.jet engine that carries its own oxygen supply．

  B.jet engine that uses no oxygen．

  C.scramjet engine that doesn't carry its own oxygen supply．

  D.rocket engine that carries its own oxygen supply.

  开始考试点击查看答案
• 3The Hyper-X broke the record because

  A.it was the first air-breathing jet plane．

  B.it flew along the equator．

  C.it traveled at the speed of sound．

  D.it reached a speed of about 5, 000 miles per hour，

  开始考试点击查看答案
• 4Generally we remember only a few facts about the past.

  A.Right

  B.Wrong

  C.Not mentioned

  开始考试点击查看答案
• 5Long—term memory is more important than short-term memory.

  A.Right

  B.Wrong

  C.Not mentioned

  开始考试点击查看答案
• 6What does NASA plan to do、

  A.To build one more Hyper-X aircraft．

  B.To carry out three more Hyper-X experiments．

  C.To make the aircraft fly higher and longer．

  D.To test another hypersonic flight at 10 times the speed of sound．

  开始考试点击查看答案
• 7Parents in the United States tend to ask their children

  A.to save food for tomorrow．

  B.to wash the dishes．

  C.not to waste food．

  D.not to eat too much．

  开始考试点击查看答案
• 8Why do American restaurants serve large portions、

  A.Because Americans associate quantity with value．

  B.Because Americans have big bellies．

  C.Because Americans are good eaters．

  D.Because Americans are too weak．

  开始考试点击查看答案
• 9What happened in the 1970s、

  A.The US government called on its people to reduce their weight．

  B.Health experts persuaded restaurants to serve smaller portions．

  C.The United States produced more grain than needed．

  D.The American waistline started to expand．

  开始考试点击查看答案
• 10What does the survey indicate、

  A.Many low-income Americans want large portions．

  B.Twenty percent of Americans want smaller portions．

  C.Fifty-seven percent of Americans want large portions．

  D.Forty-five percent of Americans want smaller portions．

  开始考试点击查看答案