题目内容

永续盘存制和实地盘存制是确定存货帐面结存数量的两种不同方法。

A. 错误
B. 错误

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某地区2002年参加医疗保险的人数是1998年的4倍，比2001年增长60%，那么，2001年参加医疗保险的人数比1998年增长()。

A. 2.5
B. 2.4
C. 1.5
D. 0.4

在大样本条件下，已求得一元线性回归方程，并给定自变量数值X0，做出点估计值$0y。若再结合用2倍值乘以估计标准误Sy，作区间预测，这时预测结果的概率保证程度是()。

A. 0.6827
B. 0.95
C. 0.9545
D. 0.9973

The credit card serves as a medium of exchange in the wide range of transactions.

A. Right.
B. Wrong.
C. Doesn't say.

We can learn from the second part of the passage that there are some equations of market which can explain the demand and supply of the currency of a country.

A. Right.
B. Wrong.
C. Doesn't say.