（理）袋中有大小相同的5个白球和3个黑球，从中任意摸出4个，求摸出2个或3个白球 发布时间：2017-05-05 23:33 │ 来源：www.tikuol.com 题型：填空题 问题： （理）袋中有大小相同的5个白球和3个黑球，从中任意摸出4个，求摸出2个或3个白球的概率______．
题型：填空题 _____________, the pay isn't attractive enough, though the job itself is quite interesting. [ ]A. Generally speaking B. On the contrary C. In particular D. to be honest 查看答案