某煤样Mad=1.67%,Aad=25.83%,求Ad
参考答案:
Ad=100Aad/(100-MaD.=100×25.83/(100-1.67)=26.27(%)
----I’m frustrated after so many failures. I can’t see any hope.
----Behind every misfortune !
A.does an opportunity lie
B.is an opportunity lying
C.lies an opportunity
D.an opportunity lies
哺乳期禁用的黏膜给药是()
A.特布他林
B.可卡因
C.雌二醇
D.碘胺嘧啶银
E.麻黄碱