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【多选题】
提高混凝土抗冲磨强度的措施包括()。A.
采用42.5强度等级中热硅酸盐水泥
B.
混凝土强度等级不宜过高
C.
选用硬质耐磨骨料
D.
掺加引气剂;面层铺硬木条保护
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反馈参考答案：
举一反三
【多选题】下列有关成本的特点表述正确的是( )。
A.
在相关范围内，固定成本总额随业务量成反比例变动
B.
在相关范围内，单位固定成本随业务量成反比例变动
C.
在相关范围内，固定成本总额不变
D.
在相关范围内，单位变动成本随业务量成反比例变动
【单选题】One’s facial expressions are ( ) what he says.
A.
more important tha
B.
as important as
C.
less important tha
D.
having nothing to do with
【简答题】What expressions are mentioned in the video? List at least two of them and translate them into Chinese.
【简答题】What expressions are suggested in the video to indicate giving a condition?
【多选题】What expressions are always used by American when bargaining the price?
A.
It's too cheap!
B.
Could you give me a little deal on this?
C.
How much is it?
D.
Could you make it cheaper?
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