梁体混凝土坍落度控制在()之间。
A.8-12cm
B.12-16cm
C.16-20cm
参考答案:B
根据汉语填写句中空白处所缺单词。
1. She didn't ______ (注意到) that she was in trouble.
2. Tom was so ______ (害怕) that he didn't know what to do.
3. Which ______ (方向) is the bus coming?
4. Don't ______ (踩踏) the grass. We should protect it.
5. I bought a new digital ______ (相机) last year.
根据条件性质,可将决策分为();不确定决策