若2a+3b-1>3a+2b,则a,b的大小关系为[ ]
A.a<b
B.a>b
C.a=b
D.不能确定
答案:A
某药的消除符合一级动力学,其t1/2为4h,在定时定量给药后,需经多少小时才能达到稳态血药浓度()
A.约10h
B.约20h
C.约30h
D.约40h
E.约50h
Being assigned as the project manager to a project you perform earned value Analysis and find the following results:EV=250000;PV=200000;AC=275000;BAC=500000.What is right ?()
A.EAC=400000
B.EAC=550000
C.BTC=400000
D.ETC=75000