空压机运转数分钟后,当确认其它运转正常时,再关上储气罐和中间冷却器阀门,然后打开() 发布时间:2017-09-29 09:45 │ 来源:www.tikuol.com 题型:单项选择题 问题: 空压机运转数分钟后,当确认其它运转正常时,再关上储气罐和中间冷却器阀门,然后打开()阀门进入正常工作。A、送风B、安全C、切断D、控制
题型:单项选择题 . Inoculation(接种) of the H1N1 vaccine ___ launch another round to weak people in February,but due to a global shortage, that has not happened yet.A.was made toB.was supposed toC.was designed toD.was hoped to 查看答案