东北林业大学
绪论单元测试
Generally, gum rosin is produced by chemical processing of woody raw material.
A:错 B:对
答案:错
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A:错 B:对
答案:错
A:错 B:对
答案:错
东北林业大学
绪论单元测试
Generally, gum rosin is produced by chemical processing of woody raw material.
