精馏岗位接蒸汽时的注意事项?
参考答案:
接蒸汽时,先将管道设备内的冷凝水排放干净,并打开导淋阀,缓慢打开蒸汽阀暖管半小时,接蒸汽正常后,关导淋阀。
用括号里的词的适当形式完成句子。
小题1:Mr Green has four ___________. (child)
小题2:I want to buy five ___________ for supper. (tomato)
小题3: Billy has a box of ___________. He is going to share them with Sandy and Tom. (chocolate).
小题4:Don’t throw these___________ on the floor. (knifer)
小题5:We have eight ___________ every weekday. (class)
肾为()。
A.气之本
B.后天之本
C.生之本
D.封藏之本
E.罢极之本