极限开关动作应能切断电梯的供电主电路,使电梯驱动主机迅速停止运转。 发布时间:2017-11-23 19:12 │ 来源:www.tikuol.com 题型:判断题 问题: 极限开关动作应能切断电梯的供电主电路,使电梯驱动主机迅速停止运转。
题型:判断题 The children ran away________all directions the moment they caught sight of their teacher coming near. [ ]A. in B. toC. from D. off 查看答案