非处方药的临床应用
解热镇痛药
A．萘普生B．阿苯达唑C．右美沙芬D．盐酸异丙嗪E．氢溴酸山莨菪碱
参考答案：A
The new dictionaries are very useful. They _______ well and _______ already.
A．sell; have been sold out
B．sold; had sold out
C．sell; sell out
D．are sold; have been sold out
如图所示，一闭合直角三角形金属线框abc以速度v匀速穿过边界为矩形的匀强磁场区域。从bc边进入磁场区开始计时，到a点离开磁场区的过程中，线框内感应电流的变化情况是（以逆时针方向为电流的正方向）
A．
B．
C．
D．
