一木块沿粗糙斜面下滑,木块受的力是() A.重力、木块对斜面的压力、沿斜面的下滑力

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问题:

一木块沿粗糙斜面下滑,木块受的力是()

A.重力、木块对斜面的压力、沿斜面的下滑力

B.重力、斜面给的支持力、滑动摩擦力

C.重力、斜面受的压力、滑动摩擦力

D.重力、对斜面的压力、斜面给的支持力、下滑力、滑动摩擦力

考点:高中物理重力重力题库
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向日葵菌核病是向日葵生产上危害严重的流行病害。

题型:单项选择题

根据《期货公司风险监管指标管理试行办法》的规定,期货公司应当()。

A.建立与风险监管指标相适应的内部控制制度

B.建立动态的风险监控和资本补足机制

C.确保净资本等风险监管指标持续符合标准

D.对相应的风险监管指标进行敏感性测试

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假设某企业每月需要甲材料1000公斤,每公斤月储存成本为5元,一次订货成本为100元,则相邻两次订货最佳的订货间隔期为()天。一个月按30天计算。

A.5

B.6

C.7

D.8

题型:单项选择题

The most damning thing that can be said about the world’s best-endowed and richest country is that it is not only not the leader in health status, but that it is so low in the ranks of the nations. The United States ranks 18th among nations of the world in male life expectancy at birth, 9th in female life expectancy at birth, and 12th in infant mortality. More importantly, huge variations are evident in health status in the United States from one place to the next and from one group to the next.

The forces that affect health can be divided into four groupings that lend themselves to analysis of all health problems. Clearly the largest group of forces resides in the person’s environment. Behavior, in part derived from experiences with the environment, is the next greatest force affecting health. Medical care services, treated as separate from other environmental factors because of the special interest we have in them, make a modest contribution to health status. Finally, the contributions of heredity to health are difficult to judge.

No other country spends what we do per capita for medical care. The care available is among the best technically, even if used too freely and thus dangerously. Given the evidence that medical care is not that valuable and access to care not that bad, it seems most unlikely that our bad showing is caused by the significant proportion who are poorly served. Other hypotheses have greater explanatory power: excessive poverty, both actual and relative, and excessive wealth.

Excessive poverty is probably more prevalent in the U. S. than in any of the countries that have a better infant mortality rate and female life expectancy at birth. This is probably true also for all but four or five of the countries with a longer male life expectancy. In the notably poor countries that exceed us in male survival, difficult living conditions are a more accepted way of life and in several of them, a good basic diet, basic medical care and basic education, and lifelong employment opportunities are an everyday fact of life. In the U. S. a national unemployment level of 10 percent may be 40 percent in the ghetto while less than 4 percent elsewhere. The countries that have surpassed us in health do not have such severe problems. Nor are such a high proportion of their people involved in them.

Excessive wealth is not so obvious a cause of ill health, but, at least: until recently, few other nations could afford such unhealthful ways of living. Excessive intake of animal protein and fats, and use of tobacco and drugs, and dangerous recreational sports and driving habits are all possible only when one is wealthy. Our heritage, desires, and opportunities, combined with the relatively low cost of bad foods and speedy vehicles, make us particularly vulnerable. Our unacceptable health status, then, will not be improved appreciably by expanded medical resources nor by their redistribution so much as by a general attempt to improve the quality of life for all.

In discussing the forces that influence health, the author implies that medical care services are()

A. a special aspect of an individual’s environment

B. a function of an individual’s behavior pattern

C. becoming less important as technology improves

D. too expensive for most people

题型:单项选择题

心悸失眠,滑精频作,少腹拘挛感,目眩,汗出,发落,脉芤而迟,治用()

A.桂枝加龙骨牡蛎汤

B.薯蓣丸

C.肾气丸

D.小建中汤

E.酸枣仁汤

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