题目内容
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Lower death rate of children owes to all of the following except women's ______ .
A．good health
B．frequent visits to health services
C．better utilization of nutrition
D．management of family resources
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更多“Lower death rate of children o…”相关的问题
Male smokers have a lower death rate from heart disease than female smokers.
A．Right
B．Wrong
C．Not mentioned
Male smokers have a lower death rate from heart disease than female smokers．
A. Right
B. Wrong
C. Not mentioned
33 Lower death rate of children owes to all of the following except women's
A good health.
B frequent visits to health services.
C better utilization of nutrition.
D management of family resources.
Lower death rate of children owes to all of the following except women's ______.
A．good health
B．frequent visits to health services
C．better utilization of nutrition
D．management of family resources
Male smokers have a lower death rate from heart disease than female smokers.
A．Right
B．Wrong
C．Not mentioned
Male smokers have a lower death rate from heart disease than female smokers
A. Right B.Wrong C. Not mentioned
Some plan to use the findings to support calls for closing the nuclear reactors at Indian Point(A nuclear power station is U. S. A. ), the plant closest to New York City. But federal officials, some radiation experts and representatives of the nuclear plants and that minute, occasional releases from such plants were much lower than natural radiation levels,
The new statistical study, which is being published in Archives of Environmental Health, was conducted by a group of scientists who for many years have intended to show a link between mortality and illness and low levels of radiation from power plants, bomb tests and other sources.
The study said the infant death rate in communities for two years before the plant shutdowns averaged 8.44 deaths per l, 000 births and, when all the mortality data for two years after the plant shutdowns were combined, the infant mortality rate dropped to 7.01 per l, 000 births. The difference was statistically significant, the authors said, and the drop was greater than the general drop in infant death rates around the country in recent years.
Joseph Mangano, a public health statistician and the national coordinator for the group, said a statistical link does not prove a cause and effect, but points to the need for more work. He said," The list is literally endless. This doesn't mean we've proved anything beyond a shadow of a doubt, but what I will say is we really need to do more follow-up."
The new study was conducted by______.
A．the government
B．radiation experts
C．antinuclear campaigners
D．public health statisticians
Population control has long been a subject of discussion among researchers. Some have argued that the supply of good land is limited. In order to feed a large population, bad land must be cultivated and the good land overworked. As a result, each person produces less in a given amount of time and this means a lower average income than could be obtained with a smaller population. Other researchers have argued that a large population gives more scope for the development of facilities such as sports, roads and railways, which are not likely to be built unless there is a big demand to justify them. Similarly, it can be argued that the public costs of society will not be so heavy to each individual if they are shared among the members of a large population.
One of the difficulties in implementing birth control lies in the fact that the official attitudes to population growth vary from country to country. In underdeveloped countries where a large population is pressing hard upon the limits of food, space and natural re-sources, it will be the first concern of government to place a limit on the birth rate. In a well-developed society the problem may be more complex. A declining birth rate may lead to unemployment because it results in a shrinking market. Cities with a declining population may have to face the prospect of a shrinking tax base and a fall in land values. If there are fewer children going to school, teachers may be thrown out of work. When the pressure of population on housing declines, prices also decline and the building industry is weakened. Faced with considerations such as these, the government of a developed country may well prefer to see a slowly increasing population, rather than one which is stable or in decline.
One reason for quick population increase in underdeveloped countries is that______.
A．those countries encourage people to have large families
B．people can get government support if they have more kids
C．improved public health standards have reduced death rate greatly
D．those countries have enough resources to support a large population
Populations tend to grow at an exponential (指数的) rate. This means that they progressively double. As an example of this type of growth rate, take one penny and double it every day for one month. After the first week you would have only 64 cents, but after the fourth week you would have over million dollars. This helps explain why the population has come on "all of a sudden". It took from the beginning of human life to the year 1830 for the population of the earth to reach one billion. That represents a time span of at least two million years. Then it took from 1830 to 1930 for world population to reach 2 billion. The next billion was added by 1960, only thirty years, and in 1979 world population reached 4 billion, which is another billion people in only fifteen years. World population is increasing at a rate of 9 000 per hour, 220 000 per day, 80 million per year. This is not only due to high birth rates, but to lower death rates as well. The number of births has not declined at the same rate as the number of deaths. Some countries, such as Colombia, Thailand, Morocco, Costa Rica, and the Philippines, are doubling their populations about every twenty-one years, with a growth rate of 3. 3 percent a year or more. The United States is doubling its population about every eighty-seven years, with a rate of 0. 8 percent per year. Every time a population doubles, the country involved needs twice as much of everything, including hospitals, schools, resources, food and medicines to care for its people, it is easy to see that this is very difficult to achieve for the more rapidly growing countries.
This passage chiefly discusses______.
A．the growth of world population in recent years
B．one type of the exponential rate
C．the population problem of the more rapidly growing countries
D．the possible ways of dealing with the rapid population growth
Population tends to grow at an exponential(指数的)rate. This means that they progressively double. As an example of this type of growth rate take one penny and double every day for one month. After the first week, you would have only 64 cent, but after the fourth week you would have over a million dollars.
This helps explain why the population has come on“all of a sudden”took from he beginning of human 1ife to the year 1830 for the population of the earth to reach one billion. That repents(缓慢进行) a time span of at least two million years. Then it took from 1830 to 1930 for world population to reach 2 billion. The next billion was added by 1960 only thirty years and in 1975 world population reached 4 billion which is another billion people in only fifteen years.
World population is increasing at a rate of 9, 000per hour, 220, 000 per day and 80 million per year. This is not only due to higher birth rate, but to lower death rate as well. The number of births has not declined at the same rate as the number of deaths.
Some countries such as Columbia, Thailand, Morocco, Costa Rica and the Philippines are doubling their population about every twenty-one years with a growth rate of 3 percent a year or more. The United States is doubling its population about very eighty-seven years, with a rate of 0. 8 percent per year. Every time a population doubles, the country involved needs twice as much of everything, including hospitals, schools, resources, food and medicines to care for its people. It is easy to see that this is very difficult to achieve for the more rapidly growing countries.
This passage chiefly discusses______________
A.the growth of world population.
B.one type of the exponential rate.
C.the population problem of more rapidly growing countries.
D.the possible ways of dealing with the rapid population growth.
According to the passage what helps to explain why the population problem has come on “all of a sudden” ？A.The penny that doubles itself every day for one month.
B.The time span of at 1east two million years in human history.
C.An illustration of the exponent growth rate given by the author.
D.The large amount of money you would luckily make after the fourth week.
It took_________ for the world to increase its population from 1 billion to 4 billion.
A.100 years
B.175 years
C.1975 years
D.over two million years
Which of the following statements is NOT true？A.World population is increasing at a rate of 150 per minute.
B.Lower death rate also contributes to world population growth.
C.The population of Columbia has been doubling every year for 21 years.
D.The United States is usually doubling its population on about every 87 years.
When a population doubles, the country involved needs twice as much of everything including __.A.hospitals and medicines
B.schools and students
C.food and manpower resources
D.all of the above
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