delta的特异性受体是()
A.NMDA-R
B.Notch
C.L-AP4-R
D.n-Ach-R
参考答案:B
—What's that on the desk?
—______ is ______ new blouse. [ ]
A. It; you
B. It; her
C. You; my
D. She; me
北京的成本费用利润为2.81%,我们对其进行函数化处理,其上限值为10%,下限值为2%,则该项指标的功效系数为( )。