2. 外语
  3. Most of us go through life adding______to knowledge, polishing a concept here or there, doing an experiment, contributing a few

Most of us go through life adding______to knowledge, polishing a concept here or there, doing an experiment, contributing a few

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问题 Most of us go through life adding______to knowledge, polishing a concept here or there, doing an experiment, contributing a few leaves—or, if we are lucky, a twig—to the tree of knowledge.
选项 A、impartially
B、impassably
C、incrementally
D、melodiously
答案C
解析 A．impartially公平地，无私地；B．impassably不可逾越的，不能通行地；C．incrementally递增地，增加地；D．melodiously旋律美妙地。
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