老年瘙痒症
参考答案：：指好发于老年人的瘙痒症，主要是因为皮肤腺体功能减退、皮肤萎缩、干燥粗糙、脱屑等引起。
简述TYJL-II型计算机联锁系统中监视控制系统的主要功能。
开放作文。
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In your spoken English class, your teacher shows you the following picture. You are asked to describe
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