茶碱的有效血药浓度范围为()
A.5~10μg/ml
B.10~20μg/ml
C.15~30μg/ml
D.20~40μg/ml
E.25~40μg/ml
参考答案:B
It’s reported that the price of meat this month is ______ that of last month.
A.half as lower as
B.half lower than
C.lower half than
D.as half low as
项目执行管理是指项目实施的执行机构对项目的管理,主要是( )对项目的管理。
A.投资者B.项目法人C.承包商D.咨询公司