对于长期处于潮湿环境的重要混凝土结构用砂,应采用()方法进行骨料的碱活性试验。
A.砂浆棒(快速法)
B.游标卡尺法
C.砂浆长度法
D.以上都不是
参考答案:A, C
根据对话内容,从方框内的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。
A:You look unhappy today.小题1:.
B:Yesterday when I came home,I found my parents looking through my schoolbag.I got very angry.Shouldn’t I keep my own secrets?
A:Of course you can keep your private ideas and secret things.小题2:.
B:No,but I shouted to them.They didn’t say a word.They just kept silent.小题3:.
A:In fact,your parents shouldn’t look through your schoolbag.They should respect your privacy.小题4:.They want to make sure you aren’t in any trouble,and they want to understand your life and study better in this way.Maybe you hurt your parents.
B:I agree.小题5:.
A:Say sorry to them.Try talking to them more.Let them know what you are doing,so that they won’t worry about you so much.
B:OK.I’ll do as you told me.
除两刃式端铣刀外,一般端铣刀端面中心无切削作用。()