What controls the migration of birds seems to be ______.

试卷相关题目

• 1The reported activity of the ant colony occurred in relation to _____.

  A.the position of the sun

  B.the day of the year

  C.the temperature

  D.the geographical location

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• 2The fiddler crab seems to darken his color according to _____.

  A.time of sunrise

  B.its background

  C.amount of daylight

  D.time of tides

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• 3The alarm clock that determines the activity of certain living things is governed by _____.

  A.hours of daylight

  B.the time of day in their native environments

  C.the moon

  D.something we don't understand completely

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• 4In the author's judgment, the ferment going on at Harvard _____.

  A.will soon be over, because times are bound to change

  B.is of interest mostly to Harvard men and their friends

  C.will influence future life in America

  D.is a sad symbol of our general bewilderment

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• 5The word “sanctuary” in paragraph 3 is _____ .

  A.a temple or nunnery of middle age

  B.a certain place you can hide in and avoid mishaps

  C.a holy place dedicated to a certain god

  D.an academy for intelligent people

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• 6The passage implies that the osmotic pump pill is better than other pills and capsules because_____.

  A.it releases medicine slowly over a long period of time

  B.the coating doesn't dissolve in the stomach

  C.the medicine in the pill can affect the body quickly

  D.it helps to build pressure in the body

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• 7The way that the osmotic pump pill works is based on a process called ______.

  A.cellulose

  B.osmosis

  C.pressure

  D.synthesis

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• 8The passage implies that medicine in an osmotic pump pill will leave the pill when _____.

  A.the pill is swallowed

  B.the cellulose coating is dissolved

  C.enough pressure builds up in the pill

  D.the medicine is dissolved with water from the body

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• 9The passage implies that cellulose is a very porous substance because it contains _____.

  A.millions of tiny holes

  B.a substance that dissolves it

  C.a substance that creates pressure

  D.liquid medicine

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• 10According to the passage, the price system is related primarily to _____.

  A.labor and education

  B.transportation and insurance

  C.utilities and repairs

  D.products and services

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