Your classroom isn't ____.It's big.[ ]
A. long
B. short
C. small
D. large
答案:C
测定抗体生成细胞数( )
A.Western Bloting B.细胞毒实验 C.溶血空斑实验D.E花环实验 E.PHA淋巴细胞转化实验
1帕(Pa)是表示每平方米面积上受1牛顿(N)的力。()