第12题: [单项选择]属于前体药物的是() A. 阿昔洛韦 B. 更昔洛韦 C. 喷昔洛韦 D. 奥司他韦 E. 泛昔洛韦 参考答案:E 答案解析:考查本组抗病毒药物的结构特征及作用特点。开环的核苷类抗病毒药物有阿昔洛韦等。更昔洛韦可以看成是具有C3-OH和C5-OH的开环脱氧鸟苷衍生物,对巨细胞病毒(
第14题: [单项选择]When things far away seem indistinct, one is probably ______. A. near-sighted B. far-sighted C. astigmatic D. suffering front cataracts 参考答案:A 答案解析:此考题为细节题。根据文章第2段首句People who are near-sighted can only See things that are very close to their eyes就可