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【单选题】
使用和保管过氧乙酸的过程中方法不正确的是A.
氧化分解，用现配
B.
可用于纺织品的消毒
C.
5%溶液用于浸泡金属器械
D.
2%溶液用于空气消毒
E.
防高温引起爆炸
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举一反三
【简答题】Mette z les verbes entre parenthèses au passé composé. Des amis (venir) _____ nous voir hier soir , Nous (sorti r ) _____ à 8 heures. Nous ( al le r ) _____ au cin é ma. Ensuite, tout le monde( a ll e...
【单选题】选择正确的答案：Vous êtes allée au cinéma hier soir?
A.
Non, je suis restée à la maison.
B.
Oui, et elle a passé une bonne soirée.
C.
Oui, ous sommes allés chez notre fille.
D.
Nous sommes partis à midi.
【单选题】When the value of the dollar changes from 0.75 pounds to 0.5 pounds, then the pound has
A.
appreciated against the dollar by 33.3%.
B.
depreciated against the dollar by 33.3%.
C.
appreciated against the dollar by 50.0%.
D.
depreciated against the dollar by 50.0%.
【单选题】When the value of the dollar changes from £0.75 to £0.5, then _____________.
A.
the pound has depreciated and the dollar has depreciated.
B.
the pound has depreciated and the dollar has appreciated.
C.
the pound has appreciated and the dollar has depreciated.
D.
the pound has appreciated and the dollar has appreciated.
【单选题】For a______time only, customers will receive a 100-dollar coupon when they purchase a laptop computer.
A.
limit
B.
limits
C.
limited
D.
limitation
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