海螵蛸的处方用名是（）
A.官桂
B.息香
C.乌贼骨
D.大腹子
E.当门子
参考答案：C
杀菌剂能穿透细菌的细胞膜，制止细菌（）。
A、聚结
B、繁殖
C、新陈代谢
D、分裂
This is quite a difficult problem and none of us could ____ a solution to it. [ ]
A. come about
B. come out
C. come up to
D. come up with
