题目内容

They no longer ______ alcohol or cigarettes at sporting events.

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Barbie has no rivals on the market due to her enduring popularity.

Last year, the trading company saw a greatly increased profit ______ exports.

每次合作学习活动结束的时候让学生以小组为单位总结回顾合作的过程，反思下次合作时如何做到更好，对于学生掌握合作学习技能会很有帮助。

氯丙嗪是一个抗抑郁药，结构中含有吩噻嗪母核。