A. sadness is as contagious as happiness

　　B. anger is less contagious than friendliness

　　C. surprise is more contagious than smile

　　D. surprise is the most contagious among emotions

　　68. Which of the following statements is true according to the passage?

　　A. Emotions have delicate influence on fellow humans.

　　B. Children like copying the actions of fellow humans.

　　D. People tend to communicate more with body language.

　　C

　　C

　　Michael Fish may soon be replaced as a weather forecaster by something truly fishier---the shark(鲨鱼).

　　Research by a British biology student suggests that sharks could be used to predict storms.

　　Lauren Smith, 24, is close to completing her study on shark’s ability to sense pressure.

　　If her studies prove the theory, scientists may be able to monitor the behaviour of sharks to predict bad weather.

　　Miss Smith had previously studied the behaviour of lemon sharks in the Bahamas.

　　She then used their close relatives, lesser spotted dogfish, for further research at Aberdeen University.

　　Her work---thought to be the first of its kind to test the pressure theory ---- resulted from the observation that juvenile blacktip sharks off Florida moved into deeper water ahead of a violent storm in 2001.

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