触电时，电流对人体的伤害程度，主要取决于下列几个因素（）。
A、电流强度
B、带电体的长短
C、触电的时间
D、电流通过人体的途径
参考答案：A, C, D
As soon as little Tom had ________ a little from his operation at his back, his first thought was to get out to meet his friends.
A．returned
B．survived
C．absorbed
D．recovered
井下防爆电气设备变更额定值使用和进行技术改造时，必须经（）的矿用产品质量监督检验部门检验合格后，方可投入运行。
A、集团公司授权
B、省级管理部门授权
C、国家授权
