问题
单项选择题
机床的（）是在重力、夹紧力、切削力、各种激振力和温升作用下的机床精度。
A．几何精度
B．运动精度
C．传动精度
D．动态精度
答案
参考答案：D
解析：
本题考核点为机床精度检测的比较。
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机床的（）是在重力、夹紧力、切削力、各种激振力和温升作用下的机床精度。
A．几何精度
B．运动精度
C．传动精度
D．动态精度
参考答案：D
解析：
本题考核点为机床精度检测的比较。
| 完形填空。 | |||
| I work in a school library. There are many kinds of 1 in it. For example (例如), books 2 English, science, history, music, and so on. You 3 do some reading or borrow books from it. But there are some 4 .You must obey (遵守) them. When you are reading in the library, you have to 5 quiet. Don't talk loudly 6 make any noise. You can't listen to music, 7 . You 8 take your bags or wet umbrellas into the library. 9 or drink in the 1ibrary. You can borrow books from the library, but you can't 10 them to others. You have to take good care of (好好保管) them and return them on time (按时归还). If the library books are lost, you have to pay for them. | |||
| ( )1. A. people ( )2. A. about ( )3. A. can ( )4. A. magazines ( )5. A. / ( )6. A. and ( )7. A. also ( )8. A. aren't ( )9. A. No eating ( )10. A. lent | B. books B. in B. have to B. rules B. are B. but B. either B. don't B. Not cat B. lended | C. magazines C. at C. can't C. CDs C. be C. or C. too C. can C. Don't eat C. lends | D. newspapers D. from D. don't D. questions D. have D. because D. and D. can't D. Can't eat D. lend |