皮皮学，免费搜题
登录
搜题
【多选题】
关于混凝土取样与试块留置的说法，正确的有______。A.
用于检查结构构件混凝土强度的试件，混凝土运至施工现场浇筑首方灰时抽取
B.
当一次连续浇筑超过1000m3时，同一配合比的混凝土每200m3取样不得少于一次
C.
每一楼层、同一配合比的混凝土，取样不得少于一次
D.
每次取样都必须留置标准养护试件，至少一组
E.
每次取样都必须留置同条件养护试件，至少三组
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】A．His physical appearance and his action. B．His way of speaking and behaving. C．His learning and behaviour. D．His way of acting and thinking.
【简答题】对乙酰氨基酚的鉴别反应为( )。
【单选题】食品检测和微生物学实验室中最常用的一种湿热灭菌法是（），它适用于各种耐高温而又不怕蒸汽的物品灭菌。
A.
流通蒸汽消毒法
B.
间歇灭菌法
C.
高压蒸汽灭菌法
D.
煮沸消毒法
【简答题】假如有一邻苯二甲酸氢钾试样，其中邻苯二甲酸氢钾含量约90%，余为不与碱作用的杂质，今用酸碱滴定法测定其含量。若采用浓度为1.000mol/L NaOH标准溶液滴定，与控制滴定时碱溶液体积在25mL左右通过上述的计算结果，说明为什么在滴定分析中通常采用的滴定剂浓度为0.1~0.2mol/L。
【单选题】My uncle went to see me off. [ ]
A.
in his way
B.
on his way
C.
by the way
D.
out of his way
【简答题】A．His physical appearance and his action. B．His way of speaking and behaving. C．His learning and behavior. D．His way of acting and thinking.
【单选题】He must be _________ home now.
A.
on his way to
B.
on his way
C.
in his ways to the
D.
in his way
【单选题】In addition to his intelligence, he works very hard, so he is well ____________ to becoming a fine mechanic. A. in the way B. on his way C. at the way D. by the way
A.
in the way
B.
on his way
C.
at the way
D.
by the way
相关题目：
参考解析：
知识点：
题目纠错 0
发布
