混凝土结构工程观感质量检查包括哪些?
参考答案:
1)漏筋;
2)蜂窝;
3)孔洞;
4)夹渣;
5)疏松;
6)裂纹;
7)连接部位缺陷;
8)外形缺陷;
9)外表缺陷。
内存(主存储器)比外存(辅助存储器)
A.读写速度快
B.存储容量大
C.可靠性高
D.价格便宜
Now the environment in city is _______ than it was before. We should keep it clean. [ ]
A. much better
B. more worse
C. more better
D. much worse