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问题 单项选择题

A．It conserves battery power.

B．It lets your laptop rest.

C．It makes your laptop easy to control.

D．It replaces screen saver.

答案

参考答案：A

解析：What is the benefit sleep mode brings to the laptop

选择题

—I can't decide _______.

—You mean the purple sweater or the blue one?[      ]

A. how to go there

B. Who to go With

C. where to visit

D. which to choose
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单项选择题

在以下( )，线程就进入可运行状态。

A．线程调用了sleel()方法时

B．线程调用了join()方法时

C．线程调用了yield()方法时

D．以上都是
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