城乡集市贸易市场可以出售
A．西药
B．中药材
C．非处方药
D．中成药
E．医疗器械
参考答案：B
Of all my subjects, I like _____ physics best because I hope to become _____ scientist. [ ]
A. the; 不填
B. the; a
C. 不填; a
D. the; the
下列化学物质毒性大小比较正确的顺序是( )
A．苯酚＜苯B．乙炔＞乙烯＞乙烷C．戊烷＞己烷＞庚烷D．伯胺＜仲胺＜叔胺E．CH4＞CH3Cl＞CH2Cl2＞CHCl3＞CCl4
