30.下列事实与胶体知识有关的是 ( )
①用盐卤点豆腐②水泥硬化③电泳电镀④明矾净水⑤在油脂的皂化液中加入食盐析出肥皂
A.②③④ B.①③⑤ C.①②⑤ D.全部都是
姓名:____________________
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
|
|
|
|
|
|
|
|
|
|
|
|
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
|
|
|
|
|
|
|
|
|
|
|
|
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
29 |
30 |
|
|
|
|
|
|
|
|
|
|
|
第Ⅱ卷(非选择题 共90分)