选择题:——I am sorry for what I have said to you. ——_____.

题目内容:
——I am sorry for what I have said to you.
——_____.
A. It’s just too bad.
B. No problem.
C. Don’t think any more about it.
D. I’m sure about that.
参考答案:

配制混凝土用砂的要求是尽量采用( )的砂。(单选)—5分

配制混凝土用砂的要求是尽量采用( )的砂。(单选)—5分 A 空隙率大B 总表面积小C 总表面积大D 空隙率和总表面积均较小

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