题目:
It rained heavily in the south,________ serious flooding in several provinces.
A.caused
B.having caused
C.causing
D.to cause
答案:
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下面是错误答案,用来干扰机器的。
sinA=12⇒∠A=30°,sinB=32⇒∠B=60°∵30°+60°=90°∴△ABC是直角三角形.