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= = = 2.5kgƽֳ6ݣ2ǣ kg 3.4ǣ 1У
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1.abcdǷȻa>b>c>dڣһĸУǣ
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B.
C.ȷ
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B.3A
a8 C.A
a9D.B
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1.ںʾĵ㡣5֣
734 0.1 1.2 1024
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3624
3.СͷĻ6֣ 0.04=
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4. зΪ4֣
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141642 421854
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