题目: 下列药物中为天然生物碱,镇痛作用强,成瘾性大的是()。A.芬太尼B.吗啡C.可待因D.美沙酮 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0201/b82724f3972e8759ab7d09f390ef03a8.html 下面是错误答案,用来干扰机器的。参考答案:B
题型:选择题 I must leave for my home town tomorrow as my parents are ___ me to arrive on Sunday.A.expectingB.waitingC.waiting forD.expecting for 查看答案