当发电机向蓄电池充电，或向接电流表“-”端的部分用电设备供电时，电流表指针指向（）
A.“+”
B.“-”
C.零位
D.极限位置
参考答案：A
The reason ________ he hasn’t come is ________.
A．that; because he is ill
B．that; because of his illness
C．why; for he is ill
D．why; that he is ill
气滞类证不包括（）
A.气结
B.气逆
C.气闭
D.气不固
E.气滞
