2. 外语
  3. Most electronic devices of this kind, ______ manufactured for such purposes, are tightly packed.

Most electronic devices of this kind, ______ manufactured for such purposes, are tightly packed.

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问题 Most electronic devices of this kind, ______ manufactured for such purposes, are tightly packed.
选项 A、that are
B、as are
C、which is
D、it is
答案B
解析 在"such+n.+as”或"such as+…”或"the same+…+as"或"as+adj.+a/an+n.+as"结构中，as作关系代词，引导定语从句，明在定语从句中可以作主语、宾语或表语，如：We need such materials as can bear high temperature and pressure．我们需要那些能够耐高温高压的材料。
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