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【单选题】
下列烯烃中最稳定的是:A.
2,3- 二甲基 -2- 丁烯
B.
3- 甲基 -2- 戊烯
C.
反 -3- 己烯
D.
顺 -3- 己烯
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反馈参考答案：
举一反三
【简答题】The idea needs to be . ( try out)
【简答题】21.Identify the basic clause patterns of the following sentences.
They elected him president.A. SVA B. AVOC C. SVC D. SVOC
【简答题】The idea needs to be ____ (试验,考验).
【简答题】The idea needs to be ( ) .
【简答题】Identify the basic clause patterns of the following sentences.The children are sleeping.A. SVC B. SV C. SVO D. S
【简答题】(take advantage of, discourage, highly, project, drop out of, try out, in short, consider) The idea needs to be ________.
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