白细胞显微镜法计数时，白细胞稀释液通常加()
A．0.40ml
B．0.38ml
C．0.39ml
D．0.36ml
E．2.0ml
参考答案：B
With some books badly needed _____, she went to the bookstore hurriedly．
A．to buy
B．buying
C．bought
D．having bought
新生儿禁用：
A．氯霉素B．四环素C．二者均是D．二者均不是
