通常可用听诊器经腹壁闻及胎心音是在妊娠几周后（） A.18周 B.20周 C.22周 发布时间：2017-09-13 03:13 │ 来源：www.tikuol.com 题型：单项选择题 问题： 通常可用听诊器经腹壁闻及胎心音是在妊娠几周后（）A.18周B.20周C.22周D.16周E.以上均不对
题型：单项选择题 补全对话。A: Can you go to the movies tonight?B: Because my mother tells me not to go out on school nights.C: I have many rules in my house.D: I can go out.E: What are you doing now?A: Hello, Linda. 1 B: I'm doing my homework.A: 2 B: No, I can't.A: Why?B: 3 A: That's too bad. 4 B: You're lucky. _5 A: I have to help my mother do housework. And I have to practice the piano every day.B: Oh, no. That's terrible. 查看答案