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【单选题】
关于苯的酰基化反应,下列叙述错误的是( )A.
酰基反应的反应物是酰卤或酸酐，催化剂是无水氯化铝，产物是芳香酮
B.
苯酰基化不发生多取代，也不发生重排，是制备一取代苯的好方法
C.
硝基苯既难发生烷基化反应，也难发生酰基化反应
D.
苯的酰基化反应又称为-克拉夫茨反应，简称-克反应
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【简答题】One day Mrs. Perry said to her husband, “Jack, I’m going to a ladies’ luncheon( 午宴 ) . I know you won’t cook. So I’ll leave you some food for your lunch. Is that all right?” “Oh, yes.” her husband ans...
【判断题】感性诉求方式,广告采取感性的说服方式,向受众诉之以情,是其次是有留意该产品服务理念的情感和态度。情感的主张与幽默、欢乐、亲情、恐怖、恐惧、地位、声望、性感、担忧、嫉妒等( )
A.
正确
B.
错误
【单选题】---Bob! Would you please ask all your classmates_______ before Miss Li back? ---OK. I’ll take them right away.
A.
not to leave; will come
B.
not to leave; comes
C.
even; improve
D.
very;improve
【单选题】---Bob! Would you please ask all your classmates_______ before Miss Li_______ back? ---OK. I’ll take them right away.
A.
not to leave; will come
B.
not to leave; comes
C.
don’t leave; comes
D.
don’t leave; will come
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