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【单选题】
自由基本体聚合反应时,会出现凝胶效应,而离子聚合反应则不会原因在于( )A.
链增长方式不同
B.
引发反应方式不同
C.
聚合温度不同
D.
终止反应方式不同
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反馈参考答案：
举一反三
【单选题】听力原文：A: I'm really getting worried about Mary. She was sitting in for the exam in two weeks' time. But all she is talking about now is nothing but an upcoming concert. B: She may fail along that line....
A.
To persuade Mary to spend more time on her lessons.
B.
To help Mary to prepare for the upcoming concert.
C.
To talk with Mary about going to the concert.
D.
To ask Mary to stop worrying about the exam.
【单选题】在学习“电离平衡”概念之前已经学习了“化学平衡”的有关知识，根据“化学平衡”的相关知识来学习“电离平衡”，我们选择的策略是（ ）
A.
概念形成策略
B.
概念图策略
C.
概念同化策略
D.
多重联系策略
【单选题】Entering the room, I found Mary _______ at the desk and _______ a letter.
A.
seated; wrote
B.
sitting; written
C.
seating; writing
D.
seated; writing
【单选题】Alice is sitting ________ two students. The one on her left is Mary and the one on her right is James. [ ]
A.
behind
B.
between
C.
in front of
D.
across from
【单选题】Entering the room, I found Mary ______at the desk and ______a letter.
A.
Seated；wrote
B.
Sitting；written
C.
Seating；writing
D.
Seated；writing
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