问题
判断题
阶梯轴便于轴上零件的装拆和固定,因此在机器中应用最为广泛。
答案
参考答案：对
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阶梯轴便于轴上零件的装拆和固定,因此在机器中应用最为广泛。
参考答案：对
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| A professor (教授) told his students to go into the city slums (贫民窟) to study the life of 200 boys. He asked them to 1 reports about each boy's life and future. One of the students wrote, "They don't have any hope." Twenty-five years 2 , another professor read about the earlier study. He told his students to 3 what had happened to the boys. They tried very hard and found that 176 of the boys had become successful 4 doctors, teachers and scientists. The professor was very 5 and decided to study it further. Luckily, all of them were living near the place and he was able to ask each one, "What made you 6 ?" Each one answered, "It was a teacher." The teacher was 7 living there, so the professor found her and asked the old woman 8 she had done to pull those boys out of the slums, and change them 9 successful people. The teacher's 10 began to shine and said with a sweet smile, "It's really very easy. I love those boys." | ||||
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