根据卫生部输血指南,Hb大于多少时不需要输血()。
A.100g/L
B.200g/L
C.250g/L
D.300g/L
E.400g/L
参考答案:A
下列物质中,属于氧化物的是( )
A.H2SO4
B.O2
C.Na2CO3
D.Al2O3
The manager promised to keep me _____ how our business was going on.[ ]
A. informing of
B. informed of
C. to inform of
D. on informing