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【多选题】
三体散射回波（TBSS）是强冰雹的典型特征，主要是指( )
A.
强度≥30dBZ
B.
强度≤20dBZ
C.
呈类似细长的钉子状
D.
径向速度很小
E.
从强回波区沿径向伸展
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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.