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从原理上讲,螺纹联接放松的措施包括
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下面哪个轴承不宜用来同时承受径向载荷和轴向载荷。
Is teaching important？Well, of course it is. There was a time when the necessary knowledge could be taught to the young by family members. But as societies became more complex and division of labor more common, it was impossible for family members to teach the information and skills young people needed to become useful members of the society. As the need for specialists appeared, the job of teaching came into being in our county, and teaching as a job has been of increasing importance over the past hundred years. Today, we have strict rules for teachers. We hope all children can attend schools. Many things tell us that teaching is indeed an “important” job.In recent years, there has been an increasing need for teachers to be “responsible”. This means that the public expects teachers to succeed in teaching important information to the young. Teachers’ salaries today, while not much, certainly are much higher than they were in past year. These increases have come about because people have realized that without enough salaries, people who have abilities will not become teachers. Today almost no one says that “anybody will do” for a teacher. The public expects “quality people” to teach the young, and progress is being made to give salaries that will make people who have abilities become teachers.1. Before the job of teaching came into being,______.
What do the speakers mean?
Directions: In this section, you will hear 8 short conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked [A], [B], [C] and [D], and decide which is the best answer. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.What will the speakers probably do?
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