高压设备的接地短路电流设备，保护接地电阻不大于（）Ω
A、4
B、0.5
C、5
D、10
参考答案：A
大多数药物出现作用由快到慢的顺序为
A．＞＞＞
B．＞＞＞
C．＞＞＞
D．＞＞＞
E．＞＞＞
Tom hopes his brother _____ to his party. [ ]
A. has come
B. to come
C. came
D. will come
