研末冲服，不入煎剂的药物是（）。
A.龙骨
B.牡蛎
C.琥珀
D.磁石
E.三七
参考答案：C
He any classes last week. [ ]
A. doesn't have
B. didn't have
C. isn't have
D. wasn't have
脂溶性外来化合物通过生物膜的主要方式是（）
A．简单扩散
B．滤过
C．易化扩散
D．主动转运
E．胞饮和吞噬
