21.硝酸酯類與β受體阻斷藥聯(lián)合應(yīng)用抗心絞痛的藥理依據(jù)是

A.消除反射性心率加快                                    B.降低室壁肌張力

C.縮短射血時間                                               D.以上都是

22.阿卡波糖降糖作用機制是

A.促進胰島素釋放                                           B.促進組織攝取葡萄糖

C.抑制α葡萄糖苷酶                                        D.增加肌肉對胰島素的敏感性

23.喹諾酮類藥物不宜應(yīng)用于

A.潰瘍病患者                                                  B.肝病患者  

C.嬰幼兒                                                         D.老年人

24.用于控制瘧疾發(fā)作的最佳抗瘧藥是

A.氯喹                                                             B.奎寧  

C.伯氨喹                                                         D.青蒿素

25.糖皮質(zhì)激素用于嚴重細菌感染的主要目的是

A.加強抗菌素的抗菌作用

B.提高機體的抗病力

C.直接對抗內(nèi)毒素

D.抗炎、提高機體對細菌內(nèi)毒素耐受力，制止危重癥狀發(fā)展

26．磺胺類藥物的作用機制是與細菌競爭

A.二氫葉酸合成酶                                           B.二氫葉酸還原酶

C.四氫葉酸合成酶                                           D.四氫葉酸還原酶

27．下列最易引起水電解質(zhì)紊亂的藥物是

A.氫氯噻嗪                                                      B.呋塞米      

C.螺內(nèi)酯                                                         D.氨苯蝶啶

28．在體內(nèi)外均有抗凝血作用的凝血藥物是

A.氨甲苯酸                                                      B.雙香豆素  

C.華法林                                                         D.肝素

29.強心苷中毒時所致的快速型室性心律失常的首選藥為

A.苯妥英鈉                                                      B.胺碘酮      

C.普萘洛爾                                                      D.維拉帕米

30．口服下列那種物質(zhì)有利于鐵的吸收

A.維生素C                                                      B.牛奶  

C.茶                                                                D.咖啡