fused corundum
举一反三
- 下列磨料的硬度从小到大排列为： A: corundum B: quartz C: diamond D: silicon carbide
- ‘To be, or not to be’ is an example of what kind of sentence problem? A: Sentence fragment B: Fused sentence
- 中国大学MOOC: 融合型（fused society）是农业社会的行政形态。
- 融合型（fused society）是农业社会的行政形态。 A: 正确 B: 错误
- The triangular-shaped bone formed usually by five fused vertebrae that are wedged dorsally between the two hip bones is ____.