問題詳情
(3)在天然橡膠中加入哪一項物質後一併加熱，能夠改善其硬度易受環境因素影響的缺點？
(A) 小蘇打粉
(B)硫磺
(C) 食鹽
(D) 石墨。
(A) 小蘇打粉
(B)硫磺
(C) 食鹽
(D) 石墨。
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增
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