吸光度A=0时,透光率T应为()。
A.0
B.10%
C.50%
D.100%
E.∞
参考答案:D
The old man had one son and two daughters, treated him well, made him very sad.
A.neither of whom; that
B.neither of them; which
C.none of whom; which
D.none of them; which
试述白细胞分类计数质量控制的主要内容。