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【单选题】
以下溶液稀释10倍时pH改变最大的是( )A.
0.1 mol/L NaAc 溶液
B.
0.1 mol/L NaAc-0.1 mol/L HAc 溶液
C.
0.1 mol/L NH 4 Ac-0.1 mol/L HAc 溶液
D.
0.1 mol/L NH 4 Ac 溶液
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【简答题】问君能有几多愁 ? 。
【单选题】关于建筑石材的物理性能及测试要求的下列说法中，有误的是：
A.
密度为 2. 5?2. 7g/cm3
B.
孔隙率一般小于0.5%，吸水率很低
C.
抗压强度高，抗拉强度很低
D.
测定抗压强度的试件尺寸为150X150X150 (mm)
【单选题】They don't dare _____ their parents this affair.
A.
tell
B.
to tell
C.
telling
D.
tells
【单选题】Even though the young like to use the latest in words, they ______ use the fabulous and obsolete words.
A.
don't dare
B.
dare not
C.
won't dare
D.
dare not to
【简答题】Lots of people don't dare to make mistakes. They fear that they will be ridiculed or ____1___ (blame) by others. They fear that they will lose their money and belongings or be under a lot of stress. B...
【简答题】选项:without fear under unavoidable so that success reach wisely as long as between 正文:Lots of people don't dare to make mistakes. They 1_____________ that they will be ridiculed or blamed by others. Th...
【单选题】听力原文：W: Many Chinese students just don't open their mouth to say anything in a classroom. M: I think they don't speak because their culture values modesty, and they don't want to appear to be showing ...
A.
They are too shy.
B.
They are not allowed to speak.
C.
They are modest.
D.
They don't dare to speak.
【简答题】A．They themselves would like to do it but don't dare to. B．It's an opportunity for relieving their tension. C．It's a rare chance for them to see the boss lose face. D．They have seen this many times in...
【简答题】 Lots of people don't dare to make mistakes. They fear that they will be ridiculed or ___1____(blame) by others. They fear that they will lose their money and belongings or be under a lot of stress. ...
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