什么叫吸附剂中毒？
参考答案：
吸附剂被油、烃类等饱和后，不能解吸为永久吸附，称为吸附剂中毒。
There are terrible noises outside because a new bridge _____ not far from here. [ ]
A. is being built
B. will be built
C. was built
D. has been built
从进攻大城市转到向农村进军的新起点是[ ]
A．北伐战争
B．南昌起义
C．秋收起义
D．遵义会议
