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问题 单项选择题

关于笔记本和平板电脑，下列说法正确的是（）。

A、平板电脑都没有键盘

B、平板电脑没有操作系统

C、笔记本都没有重力感应

D、笔记本可以创造内容

答案

参考答案：D

单项选择题

The correlation derived from a historical analysis of bond market returns in the U.S. and in Canada is 0.72. Which of the following statements is true（）

A. When the U. S. market has a below average performance, the Canadian market is likely to have a below average performance.

B. When the U. S. market rises 1%, the Canadian market rises 0.72%.

C. When the U. S. market rises, the Canadian market is more likely to decrease than increase.
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判断题

新装SF6断路器投入运行前必须复测气体的含水量和漏气率。第七章
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