问题
多项选择题
当发现数控镗床各坐标轴无法移动时，产生此故障的机械方面原因主要有（）。
A.滚珠丝杠联轴器松动
B.导轨压板研伤
C.移动部件的镶条间隙未凋好
D.导轨面拉毛、研伤
E.移动部件润滑不良
F.滚珠丝杠咬死
答案
参考答案：A, B, C, D, E
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当发现数控镗床各坐标轴无法移动时，产生此故障的机械方面原因主要有（）。
A.滚珠丝杠联轴器松动
B.导轨压板研伤
C.移动部件的镶条间隙未凋好
D.导轨面拉毛、研伤
E.移动部件润滑不良
F.滚珠丝杠咬死
参考答案：A, B, C, D, E
| 根据表格所提供的信息选择最佳答案 | ||||||||||||||||||||||||||||||
Mascots(吉祥物) for the Olympic Games
| ||||||||||||||||||||||||||||||
| 1. From the information above, we know the Olympic Games is held every __________ years. | ||||||||||||||||||||||||||||||
| A.3 B.4 C.5 | ||||||||||||||||||||||||||||||
| 2. The mascots for Beijing Olympic Games are 2 more than those for __________ Olympic Games. | ||||||||||||||||||||||||||||||
| A.Sydney B.Los Angeles C.Atlanta | ||||||||||||||||||||||||||||||
| 3. The mascot for the __________ Olympic Games was the first Olympic mascot in Olympic history. | ||||||||||||||||||||||||||||||
| A.1996 Munich B.1984 Beijing C.1972 Munich | ||||||||||||||||||||||||||||||
| 4. The 23rd and 26th Olympic Games were held in the same __________. | ||||||||||||||||||||||||||||||
| A. town B. city C. country | ||||||||||||||||||||||||||||||
| 5. Which of the following information is NOT true? | ||||||||||||||||||||||||||||||
| A. The 1996 Olympic Games was held in America. B. The 27th Olympic Games was held in Europe. C. Beijin  g is getting ready for the 29th Olympic Games. |
