试题与答案

蛛网膜下腔出血的常见病因A.高血压 B.动脉粥样硬化 C.粟粒样动脉瘤 D.脑动静脉

题型:单项选择题

题目:

蛛网膜下腔出血的常见病因

A.高血压

B.动脉粥样硬化

C.粟粒样动脉瘤

D.脑动静脉畸形

E.梭形动脉瘤

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C

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题型:单项选择题

Nutritional statements that depend on observation or anecdote should be given serious consideration, but consideration should also be given to the physical and psychological quirks of the observer. The significance attached to an experimental conclusion depends, in part, on the scientific credentials of the experimentalist; similarly, the significance of selected observations depends, again in part, on the preconceptions of the observer.
Regimes that are proposed by people who do not look as if they enjoyed their food, and who do not themselves have a well-fed air, may not be ideal for normal people. Graham Lusk, who combined expert knowledge with a normal appreciation of good food, describes how he and Chittenden, who advocated a low-protein diet, spent some weeks in Britain eating the rations of the 1914-1918 war and then got more ample rations on board ship. Lusk attributed his sense of well-being to the extra meat he was eating; Chittenden attributed it to the sea air.
When young animals are reared for sale as meat, the desirable amount of protein in their food is a simple matter of economics. Protein is expensive, so the amount given is increased up to the level at which the increased rate of growth is offset by the increased cost of the diet. As already mentioned, the efficiency with which protein is used to build the body diminishes as the percentage of protein in the diet increases. In practice, the best diets seem to contain between 15 and 25 per cent protein. It is not certain that maximum growth rate is desirable in children; some experiments with rats suggest that rapid growth is associated with a shorter ultimate expectation of life.
There are practical and ethical obstacles to human experiments in which the effect of protein can be measured. Children do not grow as fast as the young animals in which there is a commercial interest. Their need for protein is therefore presumably smaller, but there is no evidence that the desirable protein level, after weaning, is less than 15 per cent. An argument against this percentage of protein is that in human milk only 13 per cent of the solid material is protein. That protein is, however, of better quality than any protein likely to be given to infants that are not weaned on cow’s milk.
Furthermore, milk, like other products of evolution, is a compromise. Mothers are not expendable. A species would not long survive if mothers depleted their own proteins so much in the course of feeding the first child that the prospects of later children were seriously jeopardized. Human milk is no doubt a good food, but the assumption that it is necessarily ideal is stretching belief in the beneficence and perfection of Nature too far.

When considering nutritional statements, apart from statements that depend on observation, we should also consider______.

A.(A) the strange low-protein diet

B.(B) the unusual character of the observer

C.(C) the unexpected meals provided by the observer

D.(D) the ample rations of the 1914 - 1918 war

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题型:问答题

甲公司委托外单位业务员王某与乙厂签订买卖电视机1000台的合同。双方约定,乙厂于当年5月10日送货至甲公司,甲公司收货后10天内付款。当年3月9日,王某打电话给乙厂,要求乙厂直接将货送往丙厂。履行期届至,乙厂送货至丙厂。丙厂不知此货来由,但收货。10天后,乙厂催甲公司付款,甲公司以未收到货物为由拒绝。为此,乙厂请求法院强制甲公司承担违约责任。经查,王某意图将电视机卖给丙厂,未经授权,电话告之乙厂变更交付地点。
问:(1)甲公司有无付款义务说明理由。
(2)乙厂是否违约说明理由。
(3)乙厂能否向丙厂请求返还利益说明理由。
(4)设王某打电话要求乙厂变更履行地后经甲公司追认,乙厂自听电话后15天内未明确表示同意与否,原合同履行地是否已变更说明理由。

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