主轴用螺纹连接的卡盘座必须有保险销,卡爪伸出的长度不得超出卡爪总长的()。
A.五分之一
B.四分之一
C.三分之一
D.二分之一
参考答案:C
单词拼写。
1. Look! There's a stone in the middle of the road. We'd better r________ it at once or it will be dangerous.
2. A_________ from all over the world will come to attend the Games every four years.
3. Many of the students take their c_________ into the classroom to help them do some maths work, which
is not preferred by the teachers.
4. She didn't like the plan, but p_________ I see nothing wrong with it.
5. I'd _________ (感激) it if you could drive me downtown.
6. The story of Hong Zhanhui _________ (感动, 影响) millions of Chinese.
7. The poor girl was kneeling on the ground, begging money from the p________.
8. Have you ever d________ of being in front of thousands of people at a concert, with everyone clapping
and enjoying your singing?
十八届三中全会指出,财政是国家治理的基础和重要支柱,科学的财税体制是()的制度保障
A、优化资源配置
B、维护市场统一
C、促进社会公平
D、实现国家长治久安