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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