问题
单项选择题
减少或补偿工件热变形伸长的措施之一，加注充分的（）。
A．煤油
B．机油
C．切削液
D．压缩空气
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
减少或补偿工件热变形伸长的措施之一，加注充分的（）。
A．煤油
B．机油
C．切削液
D．压缩空气
参考答案：C
| 阅读短文，选确答案.。 |
| Pat is seven years old, and his little sister May is five. Today their mother takes them to their grandma's house and then she goes out. The children play with balloons for an hour. And then at four thirty-five their grandma takes Pat into the kitchen. She gives him a nice cake and a knife and says, "Like a gentleman, give the bigger piece to the other. " Pat thinks about this for a moment. He says to May, "You cut this cake, May." |
| l. Pat is years older than May. |
[ ] |
| A. seven B. five C. two |
| 2. Their mother takes the children to . |
[ ] |
| A. go shopping B. their grandma's house. C. go to the park |
| 3. Grandma gives the cake to Tom at . |
[ ] |
| A. 4:35 B. 4:13 C. 4:15 |
| 4. The children play with balloons for . |
[ ] |
| A. an hour B. two hours . C. half an hour |
| 5. Grandma wants to give the bigger piece to . |
[ ] |
| A. Tom B. May C. their mother |