抹灰层由底层、中层、面层组成,中层的作用是______。
A.装饰
B.找平
C.粘结
D.防水
参考答案:B
抹灰层由底层、中层、面层组成,中层的作用是______。
A.装饰
B.找平
C.粘结
D.防水
参考答案:B
Choose and fill. 请你选择合适的单词填空,将下列句子补充完整。 | |
2. My father walks , but my mother walks slowly. 3. The question is . You can't answer it . 4. Don't speak . The boy is doing his homework. 5. ! You can a lovely cat. 6. Ann, please to the blackboard. |