第四章单元测试
- Dry ice is pure.( )
- 0873 has four significant numbers. ( )
- 876 has four significant numbers.( )
- Ferric oxide is FeO.( )
- Mercury is a metallic element.( )
A:对 B:错
答案:对
A:对 B:错
A:对 B:错
A:对 B:错
A:错 B:对
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第四章单元测试