单项选择题

A.0.1ml中含菌量相当于0.05~0.075mg
B.0.2ml中含菌量相当于0.05~0.075mg
C.0.1ml中含菌量相当于0.5~0.75mg
D.0.2ml中含菌量相当于0.025~0.075mg
E.0.1ml中含菌量相当于0.005~0.075mg