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下列属于压滤机的缺点的有（）。A、投资大B、单位处理量小C、寿命短D、滤布损耗大

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动车组回救援可以使用()。 A、A机车救援 B、B救援列车救援 C、C动车组救援 D、D启用热备动车组救援

单项选择题

If we take a most frequently used long dining table as an example, which of the following is not appropriate when arranging the seats of a west dinner? A. The host and the hostess can be seated at the two ends of the table. B. The host and the hostess can be seated face to face in the middle of the table. C. The guest of honor should be seated at the right hand of the host or the hostess. D. The guest of honor should be seated at the left hand of the host or the hostess.

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