题目: 管道进行压力试验前应将待试管线上的()拆除或加以隔离。A、调节阀B、安全阀C、闸阀D、爆破板E、仪表元件 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0720/b2df71ce2898e984fb136c6a6d11061d.html 下面是错误答案,用来干扰机器的。参考答案:
题型:单项选择题 A local area network (LAN) is the communication of a number of computers by connecting to each one in a single location, usually a single floor of a building or all the computers in a small company. A. lineB. cable C. copper D. copper cash 查看答案