题干
It is too wet these days because the rain for two weeks．
A：appears
B：happens
C：rests
D：continues
答案(点此获取答案解析）
D
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＝1的两个焦点，点P在双曲线上，且满足∠F1PF2＝90°，则△F1PF2的面积是( )