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职称英语
Rain clouds are characterized primarily by ______. [br] The passage implies that
Rain clouds are characterized primarily by ______. [br] The passage implies that
游客
2023-09-22
12
管理
问题
Rain clouds are characterized primarily by ______. [br] The passage implies that, in order for rain to fall, it’s necessary for water vapor to ______.
选项
A、turn to ice crystals
B、collect on solid particles and condense
C、condense on salt particles
D、rise above the lower level of clouds
答案
B
解析
短文第一段提及water vapor主要围绕固体小颗粒而形成,然后在第二段又谈及water vapor在盐颗粒上冷凝。这其实也是下雨的基本原理:水汽首先凝结在——些固体小颗粒上,然后冷凝结冰,形成水珠,到一定程度积累后就落下雨了,故选B。
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