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【单选题】
对多数冰雹云而言，其斜升气流强度较大，其最大上升速度和该速度能承托起的雹粒直径分别为（）。
A.
5米/秒以上，5-10毫米
B.
10米/秒以上，10-15毫米
C.
15米/秒以上，15-20毫米
D.
20米/秒以上，25-30毫米
参考答案：
参考解析：
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【单选题】For the (26) month, mysterious falls of large chunks of ice (冰雹) (27) rained down on Spain and Italy. Juana Sanchez, a 70-year-old woman in Almeria, southern Spain, was knocked (28) when she was struc...
A.
Although eyewitnesses to the phenomenon report that they did not see anything in the sky that could account (44) the ice, scientists had to come up with a rationalization. Professor Jesus Martinez Frias, the geologist investigating the ice falls in Spain, told BBC News that the ice pieces had probably been (45) through sudden temperature drops in the stratosphere. This was the most likely explanation, he said, for the "very unusual" phenomenon.