Scientists believe that a large meteor hit the earth thousands of years ago.

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• A．He believes that is it a good idea to do all of the things that Betty and Bill suggested.

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• Scientists have discovered a genetic defect that a...

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  A)另一些科学家说能源的问题显得很糟 , 节约能源为时已晚。 B)另一些科学家的观点是能源的状况很糟 , 节约能源迫在眉睫。 C)另一些科学家坚信环境问题会更严重 , 并且很快人们的环境将无法挽救。 D)另一些科学家相信环境变得更糟糕了 , 并且已经来不及挽救了。 E)另一些科学家认为环境问题会更严重 , 并且很快这种糟糕的环境将无法挽救。

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• According to the passage, people believe that a female's reproductive strategy is influenced by

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• Scientists believe the VLT will tell us more about____________

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• Scientists have long believed one way to stop the Earth’s atmosphere from warming is by planting more trees. The idea is that more trees will take in or absorb some of the carbon dioxide in the atmosphere. Carbon dioxide is a gas released by cars, factories and other human activities. The gas traps heat in the Earth’s atmosphere, which warms the planet. However, two new studies have found that trees may not be as helpful in reducing carbon dioxide as had been thought.

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• Some psychologists believe that a negative serf-image ____ one's working performance.

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