It was snowing hard_______we had to stay 发布时间:2017-06-20 01:23 │ 来源:www.tikuol.com 题型:选择题 问题: It was snowing hard_______we had to stay at home and watch TV.A.thatB.soC.butD.because
题型:选择题 离心泵启动后,缓慢开启油泵()阀门;容积泵从启动到作业结束前严禁关闭泵()阀;油泵启动后开启()阀;油泵运行过程中巡视检查(听()、()和()有无异响。摸:用手掌背摸()和油泵()温度是否正常。闻:闻()设备有无异味,油泵房内()浓度有无异常;看:检查()仪表、油泵进出口()指示是否正常;检查油泵机组、管道和阀门的外观,是否存在()。 查看答案