检查旋流器底流,在正常压力情况下,底流排料成什么形状?
参考答案:检查旋流器底流,在正常压力情况下,底流排料成辐射状并有中心柱。当入料压力低时,排料不成辐射状且无中心柱。
one Friday ,we were packing to leave for a weekend away _______________my daughter beard cries for belp
A after
B while
C since
D when
戊戌维新时期,梁启超曾任主笔的报纸是( )
A.《时务报》 B.《万国公报》C.《国闻报》 D.《湘报》