在治疗蛔虫病的药物中,可能引起"蛔虫游走而口吐蛔虫"的是()
A.噻嘧啶
B.三苯双脒
C.甲苯咪唑
D.枸橼酸哌嗪
E.复方阿苯达唑(含双羟噻嘧啶)
参考答案:C
如图所示,理想变压器原副线圈匝数比为,为定值电阻,是滑动变阻器,原线圈两端的输入电压,设理想交流电压表、的示数分别是、;理想交流电流表、示数分别是、。下列说法中正确的是( )
A.电压表的示数
B.滑片P向b端滑动过程中,不变、变大
C.滑片P向b端滑动过程中,变小、变大
D.通过原、副线圈的交变电流频率之比为
The young teacher wants to help his students as much as he can, but ________ the other hand, he'd better help them learn on their own.