请根据所给描述判定云状____(按照地面规定只写英文简写):积雨云发展的成熟阶段,云顶有明显的白色毛丝般的冰晶结构,多呈马鬃状或砧状。
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What were you talking about when I ___________ (come) in?
Yesterday was her first day at work and it_________ (go) well.
When I woke up it ___________ (rain) and there was a strong wind.
When they first met, they __________ (do) internships at a design company.
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