高压冲击部份用的软管必须用（）层钢丝油管。
参考答案：四
She can hardly write her own name, _____?[ ]
A. can she
B. can't she
C. need she
D. needn't she
关于胶囊剂的特点错误的是（）
A.能掩盖药物的不良嗅味
B.适合油性液体药物
C.可定位释药
D.可延缓药物的释放
E.药物在体内起效慢
