压力表的更换方法不正确的是()。A.不用做安全防护措施 B.选择经效验合格或装有出厂 发布时间:2017-11-16 13:39 │ 来源:www.tikuol.com 题型:单项选择题 问题: 压力表的更换方法不正确的是()。A.不用做安全防护措施B.选择经效验合格或装有出厂合格证的新表C.更换前,将三通旋塞置于冲洗的位置,冲洗管中的杂物D.切断压力源,拆卸旧表,更换新表
题型:单项选择题 在下列各句的空白处填上一个词,使句意合理,语法正确。1. The food in the small restaurant is both delicious and cheap, so it can _ many people every day.2. seats also make customers want to leave;3. study ways can make students get good grades easily.4. We brush our teeth with toothbrushes and _ .5. Some parents would rather _ (give) their children money instead of _____ (make) breakfast for them. 查看答案