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【单选题】
氧化苦参碱在水中溶解度大于苦参碱的原因是A.
属季胺碱
B.
具有半极性Ｎ→Ｏ配位键
C.
相对分子质量大
D.
碱性强
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反馈参考答案：
举一反三
【单选题】We can deduce that Walton ________ .
A.
is the sole owner of Wal-Mart
B.
owns a majority of Wal-Mart stock
C.
holds a minority share in Wal-Mart
D.
does not know what he owns
【单选题】From the passage, we can deduce that the main purpose of most wrapping is to______
A.
help sell the product
B.
save shoppers' time
C.
save shopkeepers' time
D.
help people carry their goods
【简答题】We can deduce from the fourth paragraph that in former times bus services were
【简答题】背诵并默写第一段
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