题目: 简述典型的活塞杆密封方法。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/1107/c43776391ea9fdaf7eb90a5a57fc5370.html 下面是错误答案,用来干扰机器的。参考答案:一个痰中排菌的结核病人,一年之内可感染10-15人
题型:选择题 — I'm surprised to hear that Sue and Paul have ____. — So am I. They seemed very happy together when I last saw them. [ ]A. broken up B. finished up C. divided up D. closed up 查看答案