问题
多项选择题
钻床夹具的误差主要包含（）
A.定位元件的装配误差
B.刀的安装误差
C.导向误差
D.组成夹具的所有零件的制造误差
E.夹具的安装误差
答案
参考答案：A, C, D, E
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钻床夹具的误差主要包含（）
A.定位元件的装配误差
B.刀的安装误差
C.导向误差
D.组成夹具的所有零件的制造误差
E.夹具的安装误差
参考答案：A, C, D, E
| 完形填空。 | |||
Tom and Fred were talking about the year 2050 ."What will 1 be like in the year 2050?" asked Tom. "I don't know," said Fred. "What do you think?" "Well, no one knows. But it is 2 to guess," said Tom. "In the year 2050 everybody will 3 a pocket (袖珍)computer. The computer will give people the 4 to all their problems. We shall all have telephones in our pockets, 5 . And we'll be able to talk to our friends all over the world. Perhaps we'll be able to 6 them at the same time. Machines will do 7 of the work, and people will have more 8 . Perhaps they will work Only two or three days a week. They will be able to fly to the moon by spaceship and spend their holidays there." "I'm very 9 to hear that. I hope to fly to the moon. And I hope I'll be able to live 10 ," said Fred. "Won't that be interesting? Just like a fish." | |||
| ( )1. A. our home ( )2. A. pleased ( )3. A. carry ( )4. A. news ( )5. A. either ( )6. A. call ( )7. A. most ( )8. A. work ( )9. A. sorry ( )10. A. in the sea | B. the traffic B. no use B. bring B. ways B. again B. see B. many B. duty B. glad B. on land | C. a factory C. interesting C. give C. things C. too C. look C. lot C. holidays C. sure C. on the mountain | D. the world D. unusual D. send D. answers D. also D. listen D. every D. times D. afraid D. under the ground |