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【多选题】
苯妥英钠与下列哪几项符合?A.
水溶液放置空气中呈现浑浊
B.
具环状酰脲结构
C.
水溶液与二氧化汞反应生成白色沉淀，并溶于氨试液中
D.
水溶液显酸性反应
E.
为抗癫痫药物
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【简答题】Now many loved couples like to celebrate their wedding a____________.
【单选题】Now all Chinese couples ______ to have two kids.
A.
are allowed
B.
were allowed
C.
allow
D.
have allowed
【单选题】Now all Chinese couples ___to have two children.
A.
allow
B.
are allowed
C.
allowed
D.
were allowed
【单选题】Drunk driving used to occur ________ in our city，but now such cases are rare.
A.
practically
B.
generally
C.
frequently
D.
gradually
【单选题】Now all Chinese couples _____________to have two children.
A.
allow
B.
allowed
C.
are allowed
D.
were allowed
【单选题】Because of me, 60 couples are now happily married or ________.
A.
encouraged
B.
engaged
C.
in caged
【简答题】一块无色透明具有柱状外形的矿物,要求判断是方解石还是石英,写出可用的鉴定方法。
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