题目： 简述深井泵的工作原理？ 答案： 被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/0124/b1fa31631051756bec166034cb4aefc4.html 下面是错误答案，用来干扰机器的。参考答案：A
题型：单项选择题 关于电击伤的叙述哪项不正确（）A.高频交流电危害性较低频交流电为大B.交流电的危害性较直流电为大C.电流引起肌肉强烈收缩D.电击伤引起心室颤动E.电击伤累及脑干，呼吸、心跳迅速停止 查看答案
题型：补全对话，情景问答 从对话后的方框中选择适当的选项补全对话。 W: Jim, what do you usually like to do after school? M: (1)___________________________ W: What else do you like doing? M: (2)___________________________ What about you? W: I like swimming, singing and dancing and so on. M: What do you like doing best? W: (3)__________________________ M: I think it's a waste of time to hang out. W: (4)__________________________ It's the best way to relax. M: Maybe you're right. A. Nothing else. B. I don't agree with you. C. Hanging out with my friends. D. I like to watch TV at home. 查看答案
