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  3. The element carbon is Awidely Bfound Cin nature in many forms including both diamonds Das well as coal.

The element carbon is Awidely Bfound Cin nature in many forms including both diamonds Das well as coal.

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问题 The element carbon is Awidely Bfound Cin nature in many forms including both diamonds Das well as coal.
选项 A、 
B、 
C、 
D、 
答案D
解析 应改为and。
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