第11题: [单项选择]When is Carl’s birthday A. That she should buy a new watch. B. That she should return it to the shop. C. That she should have it repaired. 参考答案:C 答案解析:[听力原文] W: My watch stopped again, and it has stopped three times today. M: Why don’t you take
第12题: [单项选择]斗轮机回转大齿圈模数为()。 A. m=18 B. m=20 C. m=25 D. m=30 参考答案:C