注射液除菌过滤可采用
A．细号砂滤棒
B．6号垂熔玻璃滤器
C．0.8μm的微孔滤膜
D．硝酸纤维素微孔滤膜
E．钛滤器
参考答案：B
The old town has narrow streets and small houses ________ are built close to each other.[ ]
A. they
B. where
C. what
D. that
品牌联想
