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问题 单项选择题

根据以往调查的资料，某城市职工平均每户拥有国库券和国债的方差为1600，为使极限抽样误差在概率保证程度为0.9545时不超过4元，应抽取（）户来进行调查。

A.I600

B.400

C.10

D.200

答案

参考答案：B

问答题

设在诉讼中，甲公司提出乙公司并未履行其交货的义务，则是否交货的举证责任应由谁承担为什么
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单项选择题

In order to determine the trimming arm for your vessel at any particular draft, which of the following would you compare?（）.

A.Longitudinal center of buoyancy and longitudinal center of gravity

B.Longitudinal center of floatation and longitudinal center of gravity

C.Longitudinal center of floatation and longitudinal center of buoyancy

D.Longitudinal tipping center and longitudinal center of gravity
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