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【简答题】
为什么 O 2 为非极性分子而 O 3 却为极性分子?
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反馈参考答案：
举一反三
【单选题】People eat a lot of sugar______cakes, soft drinks, sweets and so on every day.
A.
in form. of
B.
in the shape of
C.
shaped by
D.
at form. of
【单选题】( )is the usual form for small shops and businesses that provide services such as beauticians, hairdressers, photographers, gardeners and so on.
A.
Partnership
B.
Company
C.
Sole trader
D.
Franchise
【简答题】However one method could be to place some form of contact pads on the outside of the skin, which however gives additional problems in the form of fitting, risk of infections, reliability and so on.
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