Which of the following is NOT true of working class Americans、

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• 1What 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．

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• 2What 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．

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• 3Why 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．

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• 4Parents 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．

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• 5What 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．

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• 6Careful observations and systematic studies of sunspots

  A.were made by ancient astronomers.

  B.started in the early 17th century.

  C.were made by Galileo only.

  D.could be made without a telescop

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• 7Sunspots are cooler than the rest of the sun's surface because

  A.they produce less energy.

  B.they are buried in the sun.

  C.they are far away from magnetic fields.

  D.they are close to magnetic fields.

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• 8The leading spot and the following spot are the names of

  A.two large sunspots.

  B.a large spot and a small spot.

  C.the two spots in a spot pair.

  D.the central core and the ring around it.

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• 9If an intense sunspot activity-had occurred in 1857, the next one would have been in

  A.1858.

  B.1862.

  C.1865.

  D.1868.

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• 10In the last paragraph the word "persistent" means

  A.important

  B.effective.

  C.enduring.

  D.visibl

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