钢铁生产的水平是衡量一个国家工业、农业、国防和科学技术水平的重要标志。
参考答案:对
用所给词的正确形式填空。
1. Today is her _____ (eight) birthday.
2. This is _____ (I) mother.
3. Let's _____ (watch) TV.
4. That _____ (sound) good.
5. Do you _____ (like) basketball?
6. I have a pair of _____ (sock).
7. Henry _____ (have) a penfriend.
8. These are my _____ (photo).
9. September is the _____ (nine) month of the year.
10. There _____ (be) a baseball and some books on the desk.
水泥砂浆地面面层的施工质量要求是().
A.普通水泥强度等级不应小于32.5
B.砂应为中粗砂
C.水泥砂浆面层的厚度不应小于15mm
D.不同品种的水泥严禁混用
E.水泥砂浆面层的强度等级不应小于M10