主管机关为了维护社会秩序,可以在集会、游行、示威举行地或经过的重要单位附近设置临时警戒线,未经人民警察许可,不得逾越。这些单位是()
No more having to buy expensive textbooks which you will only use for a year or two and then sell or _______ away.
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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