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>> 国家开放大学 / 社会学概论
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【单选题】带状疱疹多见于
临床医学概论 某机字长32 位，采用原码定点整数表示，符号位为1 位，数值位为31 位，则可表示的最大正整数为（），最小负整数为（） 计算机组成原理与汇编语言 在一个工程项目的总报价基本确定后，通过调整内部各个项目的报价，达到在不提高总报价、不影响中标的同时，又能在结算时得到更理想的经济效益的报价方法是（）工程造价基础 动态存储器按行再生操作时，任何一列选择门都不打开。 微机原理与接口技术 阅读理解：阅读下列短文，回答文后问题，选择最佳答案Trees mainly serve man in three important ways: They provide him with wood and other products; they provide him shade; and they help to prevent droughts and floods.Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important．In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear.This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil allowing the rain to sink in and also bind(固定) the soil, thus preventing it from being washed away easily；but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When the top-soil is gone, nothing remains but worthless desert.Two thousand years ago，a rich and powerful country cut down its trees to build warships, with which to gain itself an empire．It set up the empire, but, without its trees, its soil became poor and grew weak. When the empire fell to pieces, the home country found itself faced by floods and starvation(饥荒)．5. Which title best fits the passage? A、 A. Trees and Man B、 B. The Function of Tree Wood C、 C. How do People do with Trees? D、 D. The Usage of Tree Roots大学英语1 For programs with _ _ _ _ _ _ _ _ _ audiences, the cost of commercials is high. A、 few B、 more C、 small D、 large大学英语1