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【单选题】
羟基酸从结构上可看做是羧酸分子中烃基上的氢原子被( )取代而形成的化合物A.
羟基
B.
醛基
C.
酮基
D.
羧基
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【简答题】A．Developing a functional organizational structure in the man's company. B．Developing the business of the man's company. C．Developing the product of the man's company. D．Developing the man's ability t...
【单选题】AIDS is developing fast in ______.
A.
Europe
B.
North Africa
C.
developing countries
D.
rich countries
【单选题】China is a _____ country, but America is a _____ country. [ ]
A.
developing; developing
B.
developed; developed
C.
developing; developed
D.
developed; developing
【单选题】Japan is a _____ country while China is a _____ country. [ ]
A.
developing; developed
B.
developing; developing
C.
developed; developing
D.
developed; developed
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