沉淀按其物理性质的不同，可粗略地分为（）沉淀和（）沉淀，介于两者之间的是凝乳状沉淀。
参考答案：晶形；无定形
句型转换。
1. She put the camera on the bed just now. (改为被动语态)
The camera _____ _____ on the bed by her just now.
2. My uncle sent me a Christmas present last year. (改为被动语态)
A Christmas present _____ _____ to me by my uncle last year.
3. Students can't take magazines out of the reading-room. (改为被动语态)
Magazines can't _____ _____ out of the reading-room by students.
4. The glass was broken by Tom. (对画线部分提问)
_____ _____ the glass _____ _____?
“集散大量人流，疏散时间集中”，“可以考虑分区入场，分区疏散”，“出入口可以考虑合用”，“应采用平面的与立体的两种方式组成疏散”，以上有关人流疏散的描述是针对以下()建筑的。
A．影剧院
B．会堂
C．体育场(馆)
D．火车站
