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2025年河南省五市第二次联考高三物理考试答案一、单项选择题:本题共7小题,每小题4分,共28分。1.B【详解】A.图乙为质点Q的振动图像,则知在t0时刻,质
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河北省!五个一名校联盟高三年级第二次联考数学参考答案!!#!由题可知!$!!!%#!槡*槡*!+(#槡*槡*槡!$%!&!因为#!'(#)$!'%($!所以#)
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1、A【详解】AD.根据质量数守恒和电荷数守恒可知解得则X比的中子数少2个,发生的是α衰变,α射线的穿透能力较弱,不能用于金属探伤,故A正确,D错误;B.半衰期
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