The writer's attitude towards laughter is-最需题库

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1In a laughter clinic, doctors
A.laugh at their patients.
B.encourage their patients to laugh.
C.smile when they don't feel like laughing.
D.never stop laughing.
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2Which of the following statements is NOT true of laughter, according to the passage、
A.It reduces pain,
B.It exercises the body.
C.it improves the body's immune system.
D.It can cure cancer.
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3Doctors have found that laughter
A.keeps down blood pressure.
B.has similar effects to physical exercise.
C.decreases the heart rate.
D.increases stress.
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4We learn from the first paragraph that laughter
A.is good for one's health.
B.is related to some illness.
C.has been investigated long since.
D.has no effect on the body.
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5What does the president say he is doing、
A.He is designing jobs for the next generation.
B.He is preparing for the 'fly' stage.
C.He is doing something for the takeoff stage.
D.He is flying an aircraft.
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6According to the passage, a greenhouse is built to
A.keep the plants warm.
B.prevent air pollution.
C.stop the greenhouse effect.
D.produce useful gases.
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7Without the greenhouse gases, the earth would
A.become warmer.
B.be much colder.
C.move more slowly.
D.move quickly.
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8A major cause of the increase in the greenhouse gases is
A.the burning of trees and crops.
B.the building of many greenhouses.
C.the burning of large quantities Of coal and oil.
D.the flooding of large areas of the world.
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9According to the passage, chlorofluorocarbon gases differ from carbon dioxide in that
A.they are more useful.
B.they are much heavier.
C.they are more efficient in making the' world colder.
D.they are more effective in catching the heat from the sun.
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10A small increase in the earth's temperature may bring about
A.a decline in agriculture.
B.a drop of the sea level.
C.the death of all animals.
D.a delay in the greenhouse effect.
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