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判斷題

液體石油瀝青依據(jù)標(biāo)準粘度劃分標(biāo)號

答案：正確

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判斷題

瀝青針入度的單位為“°”，1°=0.01mm

答案：錯誤

判斷題

石油瀝青經(jīng)老化后，其針入度值較原瀝青將降低

答案：正確

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