下列()可以将病原菌与杂菌分离开。
A、将细菌密集划线于营养培养基中
B、将细菌接种于选择培养基
C、将细菌接种于普通肉汤培养基中
D、将细菌液体培养物进行离心沉淀
参考答案:B
--- ____ at the new school?
--- Fine, I've got used to the life there and I've made some friends.
A.How are you
B.How are you doing
C.Are you getting on well
D.How do you do
水幕喷头的水量要求是至少()L/min。
A.4.5
B.5.0
C.5.5
D.6.0