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问题 解答题

一个长方体的长和宽都扩大2倍，高不变，它的体积也扩大2倍．______．

答案

一个长方体的高不变，长和宽都扩大2倍，体积就扩大：2×2=4倍．

答：体积就扩大4倍．

故答案为：错误．

单项选择题

An analyst does research about currency swap and gathers the following information about a dollar-euro currency swap in which both parties pay a fixed rate:

If both payments are quarterly and made on the basis of 30 days per month and 365 days per year, the final amount exchanged at the end of the swap are closest to:（）

A. $90 million and   €70 million.

B. $91.15 million and€71.10 million.

C. $91.42 million and€70.89 million.
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单项选择题

为用户与数据库系统提供接口的语言是

A．高级语言

B．数据定义语言(DDL)

C．数据操纵语言(DML)

D．汇编语言
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