抽油机基础的检查内容是什么?
参考答案:
①基础平面与支架中心粉线允差±1mm;
②底座水平,纵向<3/‰mm,横向<0.5/‰mm;
③底座标志与粉线偏移量<1.5mm。
---Lucy doesn’t mind lending you her dictionary.
---I think she doesn’t, but I ________do so. I’ve already borrowed one.
A.needn’t
B.mustn’t
C.can’t
D.shouldn’t
骨髓穿刺应抽取多少骨髓液滴于载玻片上?()
A.0.1~O.2ml;
B.0.5~1.0ml;
C.2~4ml;
D.0.2~O.4ml;
E.1~2ml。