动物免疫血清的除菌宜采用
A.高压蒸汽灭菌B.干烤C.滤过除菌D.紫外线E.煮沸消毒
参考答案:C
I'd like a cake _____ cream and fruit on it.[ ]
A. in
B. at
C. for
D. with
自然通风系统中常见的通风筒有:()
①、烟斗式通风筒;
②、排风筒;
③、菌形通风筒;
④、鹅颈式通风筒
A.②、③、④
B.①、②、③
C.①、③、④
D.①~④