The ______ of human knowledge are being pushed further.A、boundariesB、bordersC、

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问题 The ______ of human knowledge are being pushed further.

选项 A、boundaries
B、borders
C、limits
D、edges

答案 B

解析近义词辨析。本题四个选择项都有“边”“界”之意，但boundary分界、分界线，border边、缘，limit界限、限度，edge边、边界，依题意选B。

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