风口水压要保持比风压高多少?
参考答案:
原则上是冷却水压力必须大于炉内压力,风口一般比炉内风压大0.08—0.1mPa。冷却壁部位应高于0.03—0.05mPa。
The new campus of our school has been set up in was once a farmland.
A.what
B.which
C.that
D.where
下列哪项是T-ALL的免疫学标记()
A.CD33、CD13
B.CD3、CD7
C.CD19、CD22
D.CD41、CD61
E.CD34、CD38