From the passage we can learn that the ocean’s currents _____.

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• 1We can infer from the passage that _____.

  A.the oceans cause global warming

  B.the oceans stop global warming

  C.the oceans release nutrients and heat

  D.the ocean ecosystems face more dangers

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• 2We can conclude from this passage that        .

  A.because of jogging, heart disease is no longer an American problem

  B.jogging can be harmful if the runner is not properly prepared

  C.warm–up suits are better than T-shirts for jogging

  D.jogging is bad for your heart and lungs

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• 3The most useful kind of exercise is exercise that        .

  A.trains the body for weight lifting

  B.enables a person to run ahead with great power

  C.is both beneficial and inexpensive

  D.develops the heart, lungs, and circulatory systems

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• 4Which of the following is the only special equipment that joggers need、

  A.Good shoes.

  B.Street clothes.

  C.Expensive suits.

  D.Warm-up trousers.

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• 5The main purpose of this passage is to        .

  A.discuss jogging as a physical fitness program

  B.describe the type of clothing needed for jogging

  C.provide scientific evidence of the benefits of jogging

  D.promote some shoes for jogging

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• 6Which of the following is NOT the result of the ocean absorbing heat and carbon dioxide、

  A.It causes further acidification.

  B.It affects shell-forming species.

  C.It makes the atmosphere hotter.

  D.It regulates the Earth’s climat

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• 7This passage mainly talks about ______.

  A.the roles of oceans

  B.global warming

  C.ocean currents

  D.carbon dioxide

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