问题
多项选择题
影响金属-烤瓷界面润湿性的因素有（）
A.金属表面污染
B.合金质量差
C.金属-烤瓷结合面除气预氧化不正确
D.铸造时合金熔融温度过高，铸件内混入气泡
E.金属基底表面喷砂处理不当
答案
参考答案：A, B, C, D, E
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影响金属-烤瓷界面润湿性的因素有（）
A.金属表面污染
B.合金质量差
C.金属-烤瓷结合面除气预氧化不正确
D.铸造时合金熔融温度过高，铸件内混入气泡
E.金属基底表面喷砂处理不当
参考答案：A, B, C, D, E
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| In England nobody under the age of eighteen is allowed to drink in a public bar. Mr Brown usually went to a bar near his house, but he 1 took his son, Tom, because he was too 2 . Then, 3 Tom’s 18th birthday, Mr Brown took him to his usual bar 4 the first time. They drank for half an hour, and then Mr Brown 5 , “Now, Tom, I will tell you a 6 . You must always be careful not to drink too much. And how do you know when you’ve had 7 ? Well, I’ll tell you. Can you see those two lights 8 the end of the bar? When they seem to have become 9 , you’ve had enough and 10 go home. ” "But Dad, ” said Tom, “I can see only one light there !” | ||||
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