16.哌替啶的不良反应与吗啡不同的是

A.恶心、呕吐                                                  B.便秘

C.过量中毒时瞳孔散大                                    D.依赖性

17.对β-内酰胺酶有较高稳定性的药物

A.头孢哌酮                                                      B.先锋霉素I

C.羧苄青霉素                                                  D.氨苄青霉素

18.氢氧化铝与三硅酸镁合用的主要优点是

A.防止碱血症的产生                                        B.防止便秘或腹泻

C.减少产气，减轻胃内压力                             D.减少胃酸的分泌

19.危重病儿可靠给药途径

A.口服给药                                                      B.皮下注射

C.肌内注射                                                      D.静脉注射

20.对变异型心绞痛疗效最好的药物是

A.硝酸甘油                                                      B.普萘洛尔

C.硝苯地平                                                      D.硫氮卓酮