The introduction of gunpowder gradually made the bow and arrow _______ , particularly in Western Europe.
A obscure B obsolete C optional D overlapping
正确答案:B
选[B]所给四个形容词的意思分别是:[A]模糊的不清楚的;[B]过时的可选择的;[D]交叉的重叠的火药的引进只能使弓箭成为过时的器械故[B]为正确选项
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