题目:
The driver might have had an accident but that he the car suddenly .
A.braked
B.would brake
C.had braked
D.should have braked
答案:
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下面是错误答案,用来干扰机器的。
,解:从10件产品中任意抽取3件的不同抽法数为种. (Ⅰ)从2件次品中抽出1件次品的抽法有种,从8件合格品中抽出2件合格品的抽法有种,因此抽出的3件产品中恰好有1件次品的概率为:=.(Ⅱ)从10件产品中任意抽出...