◎ 题干
Most electronic devices of this kind, _______ manufactured for such purpose, are tightly packed.  
[     ]
A. that are
B. as are
C. which is
D. it is
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Most electronic devices of this kind, _______ manufactured for such purpose, are tightly packed.[ ]A. that areB. as areC. which isD. it is…”主要考查了你对  【非限制性定语从句】【主谓一致】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。