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试述保险合同终止的概念及其原因。

答案

参考答案：

保险合同的终止又称保险合同的消灭，是指保险合同关系的不复存在。保险合同一经终止，就失去了法律效力，保险双方当事人既不享有合同权利也不再承担合同义务。根据我国保险法的规定，保险合同终止的原因主要有：（1）因保险期限届满而终止；（2）因保险赔偿金或保险金的给付而终止；（3）因解散而终止；（4）因行使终止权而终止；（5）因被保险人、受益人死亡而终止。

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一个MS在在哪些情况下会发出随机接入请求？
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单项选择题

A weather map is an important tool for geographers. A succession of three of four maps presents a continuous picture of weather changes. Weather forecasts are able to determine the speed of air masses and fronts; to determine whether an individual pressure area is deepening or becoming shallow and whether a front is increasing or decreasing in intensity. They are also able to determine whether an air mass is retaining its original characteristics or taking on those of the surface over which it is moving. Thus, a most significant function of the map is to reveal a synoptic picture of conditions in the atmosphere at a given time.

All students of geography should be able to interpret a weather map accurately. Weather maps contain an enormous amount of information about weather conditions existing at the time of observation over a large geographical area. They reveal in a few minutes what otherwise would take hours to describe. The United States weather Bureau issues information about approaching storms, floods, frosts, droughts, and all climatic conditions in general. Twice a month it issues a 30-day "outlook" which is a rough guide to weather conditions likely to occur over broad areas of the United States. These 30-day outlooks are based upon an analysis of the upper air levels with often set the stage for the development of air masses, fronts, and storms.

Considerable effort is being exerted today to achieve more accurate weather predictions. With the use of electronic instruments and earth satellites, enormous gains have taken place recently in identifying and tracking storms over regions which have but few meteorological stations. Extensive experiments are also in progress for weather modification studies. But the limitations of weather modification have prevented meteorological results except in the seeding of super-cooled, upslope mountainous winds which have produced additional orographical precipitation on the windward side of mountain ranges. Nevertheless, they have provided a clearer understanding of the fundamentals of weather elements.

At the present time, experiments are being conducted in（）

A. 30-day "outlook"

B. controlling storms

C. satellites

D. manipulating weather
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