串联型稳压电路的调整管接成()电路形式。
A、共射极
B、分压式共射极
C、共基极
D、共集电极
参考答案:D
—Why do you want to see the pandas?
—_____ they are very friendly and cute.[ ]
A. So
B. And
C. Because
D. But
CT机的扫描方法有()
A.低压滑环螺旋扫描
B.高压滑环螺旋扫描
C.球管旋转、探测器不动
D.旋转
E.以上都是