突触间隙中具有区分于前后膜的物质是()
A.糖蛋白
B.葡萄糖
C.无机盐
D.钙离子
参考答案:A
It is not the job of the investigating committee to ___________ blame ___________ individuals.[ ]
A.allocate;to
B.allocate;for
C.allocate;/
D.allocate;at
网络会议文献的检索途径主要有哪些?