题目内容

实验室的计算机主机应关闭,显示器一般不用关闭。

A. 对
B. 错

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更多问题

When did the Chinese invent the compass ?

A. 1000 years ago
B. 2000 years ago
C. 1500 years ago

What did the ancient zhi nan zhen (指南针)look like ?

A. a spoon
B. a knife
C. chopsticks

Who invented movable tpye print about 1000 years ago ?

A. Bi sheng
B. Shen kuo
C. Zheng he

What was the earliest paper made of ?

A. leaves
B. silk
C. tree root

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