Graphene is made of（ ）element.
A、
hydrogen
B、
carbon
C、
sulfur
D、
oxygen
发布时间：2025-01-31 21:03:52
请在 下方输入 要搜索的题目：
B、
C、
D、
推荐参考答案 (
由 快搜搜题库 官方老师解答 )
答案：B
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