21.洋地黄中毒引起的快速型心律失常，抢救的首选药物是(      )

A.苯妥英钠                                                      B.胺碘酮

C.普鲁卡因胺                                                  D.普萘洛尔

22.心肌梗塞并发心室纤颤的紧急状态，应首选的抗心律失常药是(      )

A.维拉帕米                                                      B.胺碘酮

C.普萘洛尔                                                      D.利多卡因

23.强心苷中毒表现不包括(      )

A.高血镁                                                         B.视觉障碍

C.室性早博                                                      D.厌食、恶心

24.洋地黄化的病人应禁忌的是(      )

A.同用阿司匹林                                               B.同用氯化钾

C.同时静注葡萄糖酸钙                                    D.同用地西泮

25.关于肝素的描述，下列正确的是(      )

A.与维生素K竞争性拮抗

B.体内给药有效，体外无效

C.口服有效，但见效较注射慢

D.与AT—III结合，促进凝血酶等凝血因子的灭活

26.治疗肝素过量引起的自发性出血，应选用(      )

A.硫酸亚铁                                                      B.硫酸鱼精蛋白

C.凝血酶                                                         D.维生素K

27.治疗十二指肠溃疡应选用的药物是(      )

A.雷尼替丁                                                      B.阿托品

C.强的松                                                         D.苯海拉明

28.关于硫酸镁作用的描述，下列不正确的是(      )

A.降低血压                                                      B.中枢兴奋

C.骨骼肌松弛                                                  D.导泻

29.糖皮质激素隔日疗法的根据在于(      )

A.口服吸收缓慢而完全

B.体内代谢灭活缓慢，有效血药浓度持久

C.与靶细胞受体结合牢固，作用持久

D.体内糖皮质激素分泌有昼夜规律，对肾上腺皮质功能的抑制较小

30.抗绿脓杆菌感染时，下列药物无效的是(      )

A.羧苄西林                                                      B.多粘菌素

C.阿莫西林                                                      D.庆大霉素