问题
单项选择题 A1型题
采用钴铬合金铸造的支架时，下述哪种包埋方法不正确 （）
A.磷酸盐包埋料一次包埋法
B.硅酸乙酯水解液涂挂法
C.硅酸乙酯系包埋料一次包埋法
D.石膏包埋料一次包埋料
E.复合包埋料包埋法
答案
参考答案：D
解析：中熔合金-石膏系包埋材料；高熔合金-磷酸盐包埋料、硅酸乙酯包埋料。钴铬合金属高熔合金。
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采用钴铬合金铸造的支架时，下述哪种包埋方法不正确 （）
A.磷酸盐包埋料一次包埋法
B.硅酸乙酯水解液涂挂法
C.硅酸乙酯系包埋料一次包埋法
D.石膏包埋料一次包埋料
E.复合包埋料包埋法
参考答案：D
解析：中熔合金-石膏系包埋材料；高熔合金-磷酸盐包埋料、硅酸乙酯包埋料。钴铬合金属高熔合金。
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| Hi, boys and girls. I'm a computer. I stay at Mike's home. Mike's father bought me for him on his 10th birthday. Mike has a brother and his name is Dick. Mike and Dick are in the same grade, but in 1 classes. Mike studies very hard and he often 2 me to do his homework. I live in his bedroom and I like him very much. Sometimes Mike surfs the Inte  rnet to get more 3 about different places in China because he likes traveling (旅行) very much. On weekends, Mike often goes to play basketball 4 his classmates. And he goes to the school library to 5 books, too. His parents know he is a good boy and don't worry 6 his study. 7 , Dick doesn't work hard. He doesn't 8 to the teacher in class. And he is very heavy now 9 he eats lots of junk food and he doesn't like doing sports. He 10 much time playing computer games. I don't like him at all. | ||||
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