空气进罐的最后一个阀门采用安全阀,这是为防止由于操作失误造成发酵液倒流入空气过滤系统。
参考答案:错
The teacher, rather than the students, ____ to answer for the accident. [ ]
A. are
B. is
C. were
D. be
在一般的冷藏柜中,冷藏室和冷冻室的蒸发器()