托烷类生物碱的特征反应
A.Kedde反应B.Vitali反应C.Keller-Kiliani反应D.Marquis反应E.坂口反应
参考答案:D
You'd better _____ his name, address and telephone number in your notebook before you forget them. [ ]
A. puck up
B. care about
C. set up
D. set down
软胶囊囊壁的可塑性和弹性与明胶、增塑剂、水的比例有关,三者的比例通常是1:(0.4~0.6):1。()