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问题 问答题

公路工程设计变更的主要原因有哪些

答案

参考答案：

解析：公路工程设计变更的主要原因： (1)经过会审后的施工图，在施工过程中，发现施工图仍有差错，与实际情况不符者； (2)因施工条件发生变化与施工图的规定不符者； (3)材料、半成品、设备等与原设计要求不符者。

选择题

下列剖面图所示地层中，最有可能储存石油、天然气的是[ ]

A、

B、

C、

D、
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填空题


Insurance is the sharing of (1) . Nearly everyone is exposed (2) risk of some sort. The house owner, for example, knows that his (3) can be damaged by fire; the ship owner knows that his vessel may be lost at sea; the breadwinner knows that he may die by (4) and (5) his family in poverty. On the other hand, not every house is damaged by fire or every vessel lost at sea. If these persons each put a (6) stun of money into a pool, there will be enough to (7) the needs of the few who do suffer (8) . In other words the losses of the few are met from the contributions of the (9) . This is the basis of (10) . Those who pay the contributions are known as (11) and those who administer the pool of the contributions as insurer.
The (12) for an insurance naturally depends on how the risk is to happen as suggested (13) past experience. If the companies fix their premiums too (14) , there will be more competition in their branch of insurance and they may lose (15) . On the other hand, if they make the premiums too low, they will not have (16) and may even have to drop out (17) business. So the ordinary forces of supply and (18) keep premiums at a proper (19) to both insurers and those who (20) insurance.
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