From the selection, we may assume that temperature changes _______

试卷相关题目

• 1Scientists expect that the atomic clocks will be_______.

  A.more durable

  B.indestructible

  C.more precise

  D.absolutely accurate

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• 2From the facts given in this article we can tell that _______

  A.often a form of energy is useless to us until it becomes another form

  B.steam power is cheaper and better than electrical power

  C.in the near future, there will be enough nuclear power to supply all our energy needs

  D.energy can change to another form, but the new form cannot change hack into the old form

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• 3We use the terms combustion and oxidation when we talk about _______.

  A.the energy of a moving object

  B.connecting a generator to a steam turbine

  C.nuclear fission

  D.fuels which give off heat when they burn

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• 4Nuclear energy is a special sort of_____

  A.uranium

  B.chemical energy

  C.radiant energy

  D.electricity generated in atomic plants

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• 5In a toaster, _______ energy becomes heather gy.

  A.electrical

  B.mechanical

  C.heat

  D.radiant

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• 6Identical atomic clocks may be used to check_____

  A.the accuracy of predictions based on theories of relativity

  B.all of Einstein's theories

  C.the effect of outer space on an atomic clock

  D.the actual speed of an orbiting satellite

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• 7Which is implied but not stated、

  A.Precise timekeeping is essential in science.

  B.Scientists expect to disprove Einstein's relativity theories.

  C.Atomic clocks will be important in space flight.

  D.The rate of vibration of an atom never varies.

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• 8With what topic is the passage mainly concerned、

  A.The anatomy of tiny organisms

  B.The sensory organs of invertebrates

  C.The importance of vision of fish and advanced mammals

  D.The origin of the brain and the central nervous system

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• 9It can be inferred from the passage that insects do not have _______.

  A.nerve cells

  B.reflexes

  C.brains

  D.Backbones

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• 10According to the passage, what helps to coordinate the complex physical activity of a mammal、

  A.The cerebrum

  B.The midbrain

  C.The cerebrum

  D.The forebrain

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