题目内容

开式喷头一般用于______系统和水幕系统等。

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简述玉带凤蝶幼虫为害性与主要习性

It was not until 1835 however that the phenomenon (give)______a name.

We are _______________(constant)being reminded to cut down our fat intake.

Airplanes can be the best for traveling large distances in a short amount of time.()
Opting for the train saves you hassle at the airport.()
Trip goals and personal preferences should be linked.()
Bus rides might promote health.()

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