挑战习题
1/5单选题
难度:

1.下列物质因与溴水发生反应而褪色的是
A 乙烷
B 聚乙烯
C 甲苯
D 乙烯
提示1:
5rOo5oSP6IGa5LmZ54Ov5Lit5bm25LiN5ZCr5Y+M6ZSu44CC
提示2:
55Sy6Iuv5Lit5rKh5pyJ56Kz56Kz5Y+M6ZSu77yM5LiN6IO95L2/5rq055qE5Zub5rCv5YyW56Kz5rq25ray6KSq6Imy44CC
正确答案:RA==
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