蒸汽锅炉启动水泵后,打开省煤器的()和给水阀向锅炉上水。A、进、出口阀门 B、放空阀 发布时间:2017-10-18 17:14 │ 来源:www.tikuol.com 题型:单项选择题 问题: 蒸汽锅炉启动水泵后,打开省煤器的()和给水阀向锅炉上水。A、进、出口阀门B、放空阀C、安全阀D、联箱
题型:单项选择题 — Miss Wang,I feel very nervous with the competition approaching.— ________.As long as you can finish it,it is a victory.[ ]A. Take your time B. Take it easyC. No problem D. It's hard to say 查看答案