常用基准值（S=100MVA）系统标称电压U=35kV，基准电流为（）kA。
A.144.3
B.5.5
C.1.56
D.0.5
参考答案：C
脑梗死后CT出现低密度改变的时间一般是()
A．发病后即刻
B．发病后6小时
C．发病后1～2天
D．发病后1周
E．发病后1个月
One of the things we have to do to prevent a pandemic is to make sure people understand and know what they can do to minimize the commotion.
A. command B. collusion C. turmoil D. tutelage
