用耐压试验仪检测电子镇流器输入端、输出端与壳体之间介电强度。要求使用（）V、（）Hz交流电，耐压1min，不得有放电、闪洛现象。
查看答案
平巷运输对车辆装载情况应（）。
A. 认真检查
B. 不用检查
C. 有时检查
成就动机理论的主要代表人物是（）
A. 维纳
B. 奥苏伯尔
C. 阿特金森
D. 班杜拉
氨基化是内质网中最常见的蛋白质修饰。
A. 正确
B. 错误
A definite advantage of using water as a fire extinguishing agent is its characteristic of（）.
A. alternate expansion and contraction as water in a liquid state becomes a vapor
B. absorption of smoke and gases as water is converted from a liquid to a vapor
C. rapid contraction as water is converted from a liquid to a vapor
D. rapid expansion as water absorbs heat and changes to steam
微信支付 
支付宝支付