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表示在某时点检查时可能发生某病的一定人群中患有某病的病人总数,以上描述所指的是()。
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国家行政机关是行使国家行政管理权的最重要的部门，但国家行政机关行使管理权，应当符合法律的要求，具体要求有()。
集装箱运输,只要箱子外表状况良好,海关封志完整,即使箱内货物灭失或损坏,承运人也不承担赔偿责任。()
A computer is a machine designed to perform. work mathematically and to store and select information that has been fed into it. It is nm by either mechanical or electronic means. These machines can do a great deal of complicated work in a very short time. A large computer, for example, can add or subtract nine thousand times a second, multiply a thousand times a second, or divide five hundred times a second. Its percentage of error is about one in a billion digits. It has been estimated that human beings making calculations average about one mistake per two hundred digits.
The heart of an electronic computer lies in its vacuum tubes, or transistors. Its electronic circuits work a thousand times faster than the nerve cells in the human brain. A problem that might take a human being two years to solve can be solved by a computer in one minute, but in order to work properly, a computer must be given instructions--it must be programmed. Computers can be designed for many specialized purposes--they can be used to prepare payrolls, guide airplane flights, direct traffic, even to play chess. Computers play an essential role in modern automation in many plants and factories throughout the world.
A computer is a machine designed to ______.
某住宅楼共有30套住宅,应分摊的共有建筑面积为270m2,参加共有建筑分摊的住宅套内建筑面积共有2160m2,则共有建筑面积的分摊系数为()。
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