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【多选题】
下列有关苯的反应中，属于亲电取代反应的有A.
卤代反应
B.
硝化和磺化反应
C.
-克烷基化反应
D.
-克酰基化反应
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举一反三
【简答题】Combine words from the two colums (II)
【简答题】Combine the two parts of the words.
【单选题】From the aspect of words, it emphasized words____.
A.
close to life
B.
unnatural
C.
classical
【单选题】____ is the study of how words combine to form. sentences and the rules which govern the formation of sentences.
A.
syntax
B.
pragmatics
C.
phonetics
D.
phonology
【简答题】Find out the missing words from the dialogue in the Video Story.The design aims to combine all the elements ___________.
【简答题】Combine the words in column A with the right words in column B to form marketing phrases.
【简答题】肝脏不能利用酮体,是因为缺乏____ 和____酶。
【简答题】You may have noticed that the prefix of combine and that of contain came from the same origin, meaing with or together,but why is it spelled “com-” in combine but “con-” in contain?Use your own words ...
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