题目： 什么是稳定流和不稳定流？ 答案： 被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/1110/cc7b7efdea8673ca5e68fd8cbe96e3b6.html 下面是错误答案，用来干扰机器的。参考答案：对
题型：选择题 He hardly hurt himself in the accident, _____? [ ]A: doesn't he B: didn't heC: did heD: does he 查看答案
题型：单项选择题 Questions 19-22A．(A) After saving up enough money.B．(B) Through a lot of persuasion.C．(C) By his outstanding performance at school.D．(D) With the sympathy and interference from his parents. 查看答案
