B级2021.6 58-62
each step#same error#related cables#all else fails#email
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B级2017.12 58-62
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B级2016.6 58-62
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B级2018.6 58-62
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B级2020.12 58-62
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5，12，24,36,52,() A: 58 B: 62 C: 68 D: 72