单项选择题

为什么当CAN-High线或CAN-Low线断路时,CAN驱动数据总线会完全失效?(    )。
A、因为通过“中央终端电阻”必须有电流流出,以便产生CAN信号
B、在这种情况下,控制单元的供电被中断了
C、CAN信号反射过强
D、为了提高安全性能

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单项选择题

 
Passage Two
My Childhood
The experience I gained in childhood has impressed the following on my character:
First, I keep an earnest attitude towards life. I love orderliness, discipline and cleanliness. I hate to see or hear of things absurd, undisciplined or slack.
Secondly, I love an open and high environment. I’m not afraid of loneliness and seclusion. I’m willing often to get myself lost in wide open spaces. Therefore, the moment I’m in an open country, I’ll immediately feel like being back in my old home. I don’t like to live in a city. I’m afraid of socializing. I don’t crave for things urban.
Thirdly, I always prefer to be dressed in black, blue, grey and white rather than gay colors. On a couple of occasions, I did wear bright-colored dresses at my mother’s insistence, which made me feel so awkward and uncomfortable that I had soon to take them off. However, I think all that is just a matter of habit. In fact, it’s quite all right for young girls to be “decked out” to follow their natural inclination for beauty so long as it is in good taste.
Fourthly, I like to be straightforward, frank and unaffected in associating with other people. I never force myself to do what I’m unwilling to do, meet people I don’t want to meet or meals I dislike. Hence my mother said I was sort of a willful child destined to get nowhere.
Fifthly, I respect soldiers all my life. To me, they are the embodiment of nobility, courage and discipline. I am interested in everything associated with the armed forces.
Talking of my childhood, I’m forever grateful to my good parents. To them I owe my habit of living a quiet and simple and my “back to nature” propensity. They gave me a happy and clean environment so that I am now able to feel content under any circumstances. I have a deep respect and love for life. I have no grievances against humanity. I think many human failings can be remedied so long as people strive with firm determination.
Not only do I always remember my parents with gratitude, I also always bear in mind how we should behave ourselves as parents.
 
6. What the following cannot be inferred from the whole context?
A、The author is a woman.
B、The author doesn’t hate people.
C、The author always is strict to himself/herself.
D、The author is a soldier.

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