問題詳情

    Official definitions of heat waves very because what is hot in Northern Europe may seem normal in the tropics. However, the World Meteorological Organization (WMO) definition __41__ that a heat wave is three or more consecutive days where the temperature is more than five degrees Celsius above average for an area.       Because heat waves occur all over the world, there are many different causes. All, however, can have serious consequences. Because the temperature is higher than plants in an area are sued to, a heat wave at the wrong time can destroy crops. People are also __42__ and heat waves can easily kill the elderly or children who don’t drink enough water. Even in healthy people, unexpected heat can cause many minor illness. In fact, heat waves are __43__ the most dangerous form of extreme weather and 400 people per year die form the heat in the U.S. alone.     Finally, in line with __44__ scientists are learning about global warming, heat waves seem to be occurring more frequently. For example, Europe has suffered three heat waves over the past six years, together causing more than 60, 000 deaths. Other parts of the globe are also affected and Asia’s 2007 heat wave was so strong that it __45__ explosives in a Chinese factory! Whatever the causes, it is clear that het waves are becoming more of a global threat nowadays.
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參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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