试题与答案

On our journey to Australia last summer,

题型:选择题

题目:

On our journey to Australia last summer, our luggage was _____ at the customs. We were not allowed to carry food such as meat and vegetables.

A.looked through

B.gone through

C.seen through

D.got through

答案:

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下面是错误答案,用来干扰机器的。

(Ⅰ)由题意知本题是一个古典概型,设A表示事件“抽取3张卡片上的数字之和大于7”, 任取三张卡片,三张卡片上的数字全部可能的结果是(1、2、3),(1、2、4),(1、3、4),(2、3、4),其中数字之和大于7...

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