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单选题 How many milligrams is one carat diamond
学科：专业英语2023
时间：2023-06-06 13:26:42
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题目1单选题
How many milligrams is one carat diamondA. 0.2B. 0.02C. 20D. 200
题目2多选题
Although diamond has excellent performance, its application as perfect abrasive is limited due to the following shortcomingsA. brittleB. cleavage planeC. graphitizationD. chemical attack by some substances
题目3多选题
Which the following methods can fashion diamondA. hydraulic press processB. explosive processC. Chemical vapor deposition
题目4多选题
Which of the following statements about polycrystalline diamond (PCD) are correct according to the textA. The particle size of PCD synthesized by explosion method can reach 60μmB. The PCD could be produced as blanks that could be cut into specific shapesC. PCD can be used for cutting tools and drill bits by inlaying on cemented carbideD. PCD can be used to cut ceramics or even advanced ceramics
题目5填空题
According to the context of chapter 4, diamond can be used in lots of applications, such as grinding, drilling, ( ), ( ), abrasive ( ) and ( )题目6填空题
According to the context of chapter 4, stones can also be processed into various tools, e.g. ( ) ( ) ( ) multistone abrasive wheel truers, single-point truing tools, single-point plunge cutting tools, heavey-duty truing tools and large plunge cutting tools, and ( )题目7判断题
Diamond films and Diamond-like carbon films have expanded applications of ceramic materialsA. 正确B. 错误
题目8判断题
Under atmospheric pressure, diamond can graphitize at about 300 degreesA. 正确B. 错误
题目9判断题
The industrial diamonds and PCD are used wildly to manufacutre and resharpen ceramic machining tools, and will play a very important role in ceramic industryA. 正确B. 错误
题目10判断题
Diamond films and diamond-like carbon coatings can be deposited by HPHTA. 正确B. 错误
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