Thanks for your ___.[ ]
A. help
B. helping
C. helps
D. to help
答案:A
重度贫血的标准是血红蛋白为()
A.120g/L
B.110g/L
C.100g/L
D.90~60g/L
E.60~30g/L
如果工程间接费率为0.8千元/天,则最低工程费用时的工期为多少天?