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问题 单项选择题

四格表中，如有1个格子的实际频数为0，则应选用的方法为

A．四格表χ2检验

B．四格表连续性校正χ2检验

C．四格表的确切概率法

D．直接计算概率法

E．还需要看n和最小理论频数

答案

参考答案：E

填空题

A．A friend in need is a friend indeed．
B．If winter comes，can spring be far behind ?
C．Follow your own course（路径），and let people talk．
D．Give a man a fish and he will eat for a day．Teach a man to fish and he will eat for the rest of his life．
E．Good painting is like good cooking；it can he tasted，but not explained．
小题1:Sarah：Don’t care too much about what they have said，Tony．   
小题2:Stephen：Thanks for helping me，Amy．    l’m so proud of having a friend like you．
小题3:Mr. Lee：Teachers should tell the kids not only what to do，but also how to do that．   
小题4:Alan：Don’t be upset，Jeff．    The great success is just in front of you．
小题5:Sally：I don’t want to hear the tour guide introduce the paintings in the gallery．   Don’t you think so ?
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问答题 简答题

屏蔽电缆是怎样提高供电安全性的？
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