在触电现场，若触电者已经没有呼吸或脉搏的表现，此时可以判定触电者已经死亡，从而放弃抢救。
查看答案
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
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
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