英语四级

单选题

A．It affects the growth of trees.
B．It has been increasing since the Ice Age.
C．It is determined by the chemicals in the air.
D．It follows a certain cycle.

参考答案：D进入在线模考
What do we learn from the passage about the solar wind activity?
事实细节题。根据短文最后一句The scientists concluded that the solar wind activity must follow the same cycle．可知太阳风的活动遵循着一个相同的周期。所以选D。

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1

A．Men who belong to organizations must wear jewelry.
B．Each new period brings some changes in clothing.
C．Women do not like to look attractive in new clothes.
D．Every woman wants to look attractive.

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2

A．They change to show their position in life.
B．They change as fashions in beauty change.
C．They change to attract other women.
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3

A．Some men enjoy wearing special kinds of clothing.
B．Soldiers do not allow delivery men to wear uniforms.
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D．In ancient Greece, men wearing dresses were thought to be savages.

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