【判断题】氟利昂中的氟是破坏大气臭氧层的罪魁祸首。
【单选题】Vlad allied himself with foreign countries, and restored the social order destroyed by years of wars.
【单选题】It is said that the math teacher seems towards bright students.
【判断题】《消费税暂行条例》规定,实行从价定率征税的应税消费品,其计税依据是不含增值税和消费税的销售额。( )
【简答题】碳素钢比合金钢价廉,应力集中敏感性差,___________经过热处理后,可得到较高的机械性能。
【单选题】It is said that math teacher seems ____ towards bright student.(2000.6)
【判断题】氟利昂中的氟是破坏大气臭氧层的罪魁祸首。