问题
单项选择题
某地区新建一座大型自来水厂,主要单位工程有沉淀池、过滤池、消毒池等。整个工程由W建筑公司中标施工,其中沉淀池为无盖圆形池,池壁用预制板拼装外缠绕预应力钢丝结构,为了保护钢丝不被锈蚀,在缠绕钢丝后,做喷射水泥砂浆保护层。
预制安装圆形水池壁板缝浇筑混凝土后,当壁板缝混凝土达到设计强度的( )以上才允许缠丝。
A.60%
B.70%
C.80%
D.85%
答案
参考答案:B
某地区新建一座大型自来水厂,主要单位工程有沉淀池、过滤池、消毒池等。整个工程由W建筑公司中标施工,其中沉淀池为无盖圆形池,池壁用预制板拼装外缠绕预应力钢丝结构,为了保护钢丝不被锈蚀,在缠绕钢丝后,做喷射水泥砂浆保护层。
预制安装圆形水池壁板缝浇筑混凝土后,当壁板缝混凝土达到设计强度的( )以上才允许缠丝。
A.60%
B.70%
C.80%
D.85%
参考答案:B
On a snowy evening, a rich lady was standing by the road. She was very worried. Her had broken down. Just then a poor man named Robert came. He was on his back home from work as usual. The lady wondered, "Is the man going to me? He looks very cold and hungry." But to her surprise, stopped and said with a smile, "Can I help you, madam?" After forty , the car was at last fixed by Robert. The lady wanted to pay him." No, that's , madam." he said, "I was just helping someone in . If you really want to pay me back, I hope you see someone in need, you should give him a hand." A few minutes later, the lady a shabby (破旧的)house by the road. She remembered Robert's words, so she stopped. The hostess(女主人) warmly asked her . The lady could see that was a family and that they needed help. When the hostess was making tea in the kitchen, the lady on a table 500 dollars and went away quietly. Robert came home later than before, thinking how their life was. His wife was pregnant(怀孕) and the baby was to be born the next month but there was not money. His wife went up to him, gave him a kiss and said softly, "Don't worry, dear! Everything's going to be all . A stranger has helped us out." Let's always be ready to help others because helping others is helping ourselves.
|