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这种特性是由于物质分子中含有不对称元素(通常为不对称碳原子)所致;使偏振光向右旋转者(顺时针方向,朝光源观测)称为右旋物质。A.
正确
B.
错误
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【简答题】_______ ( 我能听音乐会的唯一办法 ) is if I get this done in time
【单选题】—______ bad weather!—Yes, but it’s going to be fine soon, I think.
A.
How
B.
What a
C.
How a
D.
What
【简答题】Butit’s going to be_______ difficult to check that a piece of timber that you buyin a market here.A. organizationally B. significantly C. extraordinarily D. additionally
【简答题】曲柄摇杆机构产生“死点”位置的条件时摇杆作为__________,曲柄为__________。
【简答题】Dear World, My son starts school today. It’s going to be strange and new to him for some time. And I wish you would treat him gently. You see, up to now, he has been king of his own room. He has been ...
【简答题】阅读理解。 Dear World, My son starts school today. It’s going to be strange and new to him for some time. And I wish you would treat him gently. You see, up to now, he has been the king of his own room. He...
【简答题】曲柄摇杆机构产生“死点”位置的条件时摇杆为（），曲柄为（）。
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