问题
多项选择题
采用泵送混凝土应符合下列规定______。
A．碎石粒径与输送管内径之比小于或等于1:3
B．卵石粒径与输送管内径之比小于小于或等于1:2.5
C．通过0.315mm筛孔的砂应不少于15%
D．通过0.315mm筛孔的砂应不少于25%，砂率宜控制在60%～70%
E．砂率宜控制在25%～35%
答案
参考答案：A,B,C,D
搜题请搜索小程序“爱下问搜题”
采用泵送混凝土应符合下列规定______。
A．碎石粒径与输送管内径之比小于或等于1:3
B．卵石粒径与输送管内径之比小于小于或等于1:2.5
C．通过0.315mm筛孔的砂应不少于15%
D．通过0.315mm筛孔的砂应不少于25%，砂率宜控制在60%～70%
E．砂率宜控制在25%～35%
参考答案：A,B,C,D
| 完形填空 | ||||
| I was tired and hungry after a long day of work. When I walked into the livingroom, my 12yearold son looked up at me and said, "I__1__you." I did not__2__what to say, and I just stood there, looking __3__at him. My first__4__was that he__5__need help with his homework. Then I asked, "What was that all__6__?" "Nothing," he said, "My teacher said we should tell our parents we love them and__7__what they say." The next day I called his teacher to__8__more about what my son said and how the other parents had reacted( 反应). "Most of the fathers had the__9__response as you did," the teacher said, "When I first__10__that we try this, I asked the children__11 _they thought their parents__12__say. Some of them thought their parents would have heart trouble." Then the teacher__13__, " I want my students to know that feeling love is an important part of __14__. I'm trying to tell them it's too bad that we don't express our feelings. A boy__15__tell his father or mother he loves him or her." The teacher understands that sometimes it is__16 _for some of us to say something that is good for us to say. That evening when my son__17__to me, I took him in my arms and held on for an__18 _moment, saying, "Hey, I love you,__19__." I don't know if saying that made__20__of us healthier, but it did feel pretty good. | ||||
|