有一两级除尘系统,第一级为旋风除尘器,第二级为电除尘器,处理一般的工业粉尘。已知起始的含尘浓度为15g/m3,旋风除尘器效率为85%,为了达到排放标准100mg/m3,电除尘器的效率最少应是()。
C
暂无解析
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I’vegottheorderfromthebossthatthework_______finishedbefore5p.m.today.
Accordingtotheshipping_____itwillbeimpossibleforustoshipthegoodsinOctober.()
Traditionallinguistsbelievethatthewrittenformoflanguageis______tothespokenform.
WhichofthefollowingisNOTemphasizedbytraditionallinguists?