各式电动起重机在工作中一旦停电,应当用手动方式将抱闸松动,慢慢将所吊物件放下。() 发布时间:2019-01-23 09:05 │ 来源:www.tikuol.com 题型:判断题 问题: 各式电动起重机在工作中一旦停电,应当用手动方式将抱闸松动,慢慢将所吊物件放下。()
题型:判断题 如图14-2-3所示为滑动变阻器的示意图,下列说法中正确的是()A.a和b接入电路时,P向右移电流增大B.b 和c接入电路时,P向右移动电流减小C.c和d 接入电路时,P向右移动电流不变D.a 和c接入电路时,P向右移动电流减小图14-2-3 查看答案
题型:判断题 从方框内选适句子补全对话。A. That's nice. B. Me, too. C. So do we. D. What about weekends?E. I'm allowed to watch TV. Lily: We have a lot of rules at house. Maria: 1_____ For example, I have to stay at home on school nights. Lily: I usually do, too. But sometimes I am allowed to study at a friend's house. 2_____ Maria: Well, I'm allowed to play basketball with my friends on weekends. Lily: 3_____ But I have to be home by six p.m. Maria: And on Saturday afternoons, 4_____ Lily: 5_____ Maria: And I'm allowed to chat with my friends on line. 查看答案
题型:判断题 为尽可能降低重大事故的后果及影响,减少重大事故所导致的损失,在此之前对应急队伍的建设与训练、应急设备(施)、物资的配备与维护、预案的制定与落实以及有效的外部增援机制,体现的是应急救援行动应做到( )。A.有效B.准确C.迅速D.及时 查看答案