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防爆电动机绕组对地绝缘电阻的最小值为5MΩ。( )
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Text 2 It was late in the afternoon, and I was putting the final touch on a piece of writing that I was feeling pretty good about. I wanted to save it, but my cursor had frozen. I tried to shut the computer down, and it seized up altogether. Unsure of what else to do, I yanked (用力猛拉) the battery out. Unfortunately, Windows had been in the midst of a delicate and crucial undertaking. The next morning, when I turned my computer back on, it informed me that a file had been corrupted and Windows would not load. Then, it offered to repair itself by using the Windows Setup CD. I opened the special drawer where I keep CDs, but no Windows CD in there. I was forced to call the computer company’s Global Support Centre. My call was answered by a woman in some unnamed, far-off land. I find it annoying to make small talk with someone when I don’t know what continent they’re standing on. Suppose I were to comment on the beautiful weather we’ve been having when there was a monsoon at the other end of the phone So I got right to the point. "My computer is telling me a file is corrupted and it wants to fix itself, but I don’t have the Windows Setup CD." "So you’re having a problem with your Windows Setup CD." She has apparently been dozing and, having come to just as the sentence ended, was attempting to cover for her inattention. It quickly became clear that the woman was not a computer technician. Her job was to serve as a gatekeeper, a human shield for the technicians. Her sole duty, as far as I could tell, was to raise global stress levels. To make me disappear, the woman gave me the phone number for Windows’ creator, Microsoft. This is like giving someone the phone number for, I don’t know, North America. Besides, the CD worked; I just didn’t have it. No matter how many times I repeated my story, we came back to the same place. She was calm and resolutely polite. When my voice hit a certain decibel (分贝), I was passed along, like a hot, irritable potato, to a technician. "You don’t have the Windows Setup CD, ma’am, because you don’t need it," he explained cheerfully. "Windows came preinstalled on your computer!" "But I do need it. " "Yes, but you don’t have it." We went on like this for a while. Finally, he offered to walk me through the use of a different CD, one that would erase my entire system. "Of course, you’ d lose all your e-mail, your documents, your photos." It was like offering to drop a safe on my head to cure my headache. "You might be able to recover them, but it would be expensive." He sounded delighted. "And it’s not covered by the warranty (产品保证书)!" The safe began to seem like a good idea, provided it was full. I hung up the phone and drove my computer to a small, friendly repair place I’d heard about. A smart, helpful man dug out a Windows CD and told me it wouldn’t be a problem. An hour later, he called to let me know it was ready. I thanked him, and we chatted about the weather, which was the same outside my window as it was outside his. Which of the following is the author’s opinion about the woman at the Global Support Centre
Text 3Women’s minds work differently from men’s. At least, that is what most men are convinced of. Psychologists view the subject either as a matter or frustration or a joke. Now the biologists have moved into this minefield, and some of them have found that there are real differences between the brains of men and women. But being different, they point out hurriedly, is not the same as being better or worse. There is, however, a definite structural variation between the male and female brain. The difference is in a part of the brain that is used in the most complex intellectual processes—the link between the two halves of the brain. The two halves are linked by a trunkline of between 200 and 300 million nerves, the corpus callosum. Scientists have found quite recently that the corpus callosum in women is always larger and probably richer in nerve fibers than it is in men. This is the first time that a structural difference has been found between the brains of women and men and it must have some significance. The question is "What", and, if this difference exists, are there others Re- search shows that present-day women think differently and behave differently from men. Are some of these differences biological and inborn, a result of evolution We tend to think that is the influence of society that produces these differences. But could we be wrong Research showed that these two halves of the brain had different functions, and that the corpus callosum enabled them to work together. For most people, the left half is used for wordhanding, analytical and logical activities; the right half works on pictures, patterns and forms. We need both halves working together. And the better the connections, the more harmoniously the two halves work. And, according to research findings, women have the better connections. But it isn’t all that easy to explain the actual differences between skills of men and women on this basis. In schools throughout the world girls tend to be better than boys at "language subjects" and boys better at maths and physics. If these differences correspond with the differences in the hemispheric trunkline, there is an unalterable distinction between the sexes. We shan’t know for a while, partly because we don’t know of any precise relationship between abilities in school subject and the functioning of the two halves of the brain, and we cannot understand how the two halves inter-act via the corpus callosum. But this striking difference must have some effect and, because the difference is in the parts of the brain involved in intellect, we should be looking for differences in intellectual processing. According to the passage it is commonly believed that brain differences are caused by ______ factors.
若电动机的部分绕组出现绝缘损坏，可对线圈进行局部处理。 ( )
一台同步电动机的极对数为3，电动机的转速为3000r/min。 ( )
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