问题
多项选择题
CRT无显示但机床能够动作，其故障原因有（）、（）。
A.CRT单元输人电压不正常
B.连接CRT单元的电缆接触不良
C.显示部分出现故障
D.显示部分的控制部分出现故障
E.控制R0M板有问题
F.主印制线路板有问题
答案
参考答案：C, D
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CRT无显示但机床能够动作，其故障原因有（）、（）。
A.CRT单元输人电压不正常
B.连接CRT单元的电缆接触不良
C.显示部分出现故障
D.显示部分的控制部分出现故障
E.控制R0M板有问题
F.主印制线路板有问题
参考答案：C, D
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| IMAGINE a life without arms or legs! You can't hold anyone in your 1 . You can't walk anywhere with your feet. How would you last a day like that? Would you 2 at yourself in the mirror like Nick Vujicic, the 29-year-old Australian? Nick was born without limbs(四肢), so life was not 3 for him. At school many students played jokes on him 4 he looked different from everyone else. He was refused to be 5 friends, so he always felt 6 . However, he faced that bravely. He 7 to type and write with two toes (脚趾) at the age of six, and he could 8 surf and play golf. In college, he achieved great success and was among the 9 students in the studies. And he decided on 10 to do later in his life-to encourage others to work hard for their dreams. Now Nick is one of the most popular 11 in the world. He travels to many countries and gives speeches about 12 he fought against difficulties. "Living life fully is about looking at what you 13 , not what you don't have." he said. His 14 encourages millions of people. "I tell people to keep on getting up when they 15 and to always love themselves," he said. "If I can encourage just one person, then my job in this life is done." | ||||
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