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概括大意與完成句子

Predicting the path of a hurricane is one of the most difficult tasks for forecasters. It moves at a typical speed of 15 mph. But not always. Some storms may race at twice this speed, then suddenly stop and remain in the same location for several days. It can be maddening if you live in a coastal area that may be hit.

The main idea of this paragraph is __________.

 A、Forecast a Hurricane Through Satellite Watching

 B、The Typical Speed of a Hurricane

 C、Huge Energy Stored in a Hurricane

 D、Difficulty in Forecasting the Course of a Hurricane

【正確答案】 D

【答案解析】 段首句Predicting the path of a hurricane is one of the most difficult tasks for forecasters.是主題句，點出了這段文字的主題。

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