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【单选题】
在光照条件下,异丙苯与氯气反应的主产物是( )A.
2-苯基-1-氯丙烷
B.
邻氯异丙苯
C.
对氯异丙苯
D.
2-苯基-2-氯丙烷
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反馈参考答案：
举一反三
【单选题】(2013·青岛一模)You seem to have a readymade answer ________ I ask you a question.
A.
whenever
B.
whatever
C.
whichever
D.
whoever
【单选题】听力原文：M: You seem to know your way around the campus. Have you been here long? W: I'm a senior literature major. I'll be graduating next June. M: Your major is literature? Mine is, too. But I'm just be...
A.
She's a senior.
B.
She's a junior.
C.
She's transfer student.
D.
She's graduate student.
【单选题】W: You seem to have a lot of work at your office. You've always been staying late and working overtime. M:______
A.
What you say is right. But don't you know the meaning of work?
B.
Yes. That's true. But don't you know the common saying:' Always work and no play makes Jack a dull boy'?
C.
That's true, but it's no bother to me. The work is interesting and fun. I don't mind the extra hours at all.
D.
Sorry. I cannot listen to your advice. Overwork can bring me overpay, you know.
【简答题】某二叉树有5个度为2的结点，则该二叉树中的叶子结点数是（ ）
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