举一反三
- Text ThreeA.the next half centuryB.reducing death ratesC.developing worldD.infectious diseasesPhrases:A.could potentially become the toughest problem of ______ B.provides the tools and methods for lengthening life spans and ______ C. with virtually all the new growth occurring in the ______ D. ______ are much less frequent due largely to public health measures It is the application of technology to physical resources that provides for human life and eventually sets the limits on the number of people who can be fed,but technology also ______ . As a result,high birth rates are no longer closely matched by high death rates as they were until modern times; ______ ; and physical vitality has been increased by improved nutrition. These changes have brought about what is today familiarly called the "population explosion"which,unless checked, ______ . If the current rate of population growth continues in some parts of the world,the world population is expected to reach 9.1 billion by 2050, ______ ,while the totalpopulation of richer countries is expected to remain largely unchanged at 1. 2 billion.
- One major obstacle to economic development is population growth. The populations of most developing countries grow at a rate much faster than that of in dustrialized countries. One reason for this growth is the high crude birth-rate—the number of live births per 1,000 people.() A: to B: The populations C: that D: live births
- 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
- The population growth rate is the birth rate minus the death rate.()
- This passage tells us that ______. A: the United Nations thinks it possible to avoid a population explosion B: 5.1 billion people are living in the underdeveloped countries C: in advanced nations the population growth is being controlled D: the world's population is increasing.
内容
- 0
Well, here, so far, we're talking about a death rate of 2% which is a lot less and it does look as if many of those people actually have had ____________ health problems which would make it more likely that they would die.
- 1
Why will the population in poorer countries increase() A: Because they need more labor to support the family. B: Because the people have the habit to have a big family. C: Because the people there are poorer. D: Because the people there want to be rich.
- 2
Countries with higher saving rates may have higher equilibrium growth rates since A: people who save more also are more industrious B: higher income allows for more savings C: a higher saving rate allows for more investment in human capital which ultimately enhances economic growth D: having more capital equipment is more important than having better capital equipment E: none of the above
- 3
What does the example of India illustrate A: Wealthy people tend to have fewer children than poor people. B: Natural selection hardly works among the rich and the poor. C: The middle class population is 80% smaller than that of tribes. D: India is one of the countries with a very high birth rate.
- 4
This passage tells us that() A: the United Nations thinks it possible to avoid a population explosion B: 5.1 billion people are living in the underdeveloped countries C: in advanced nations the population growth is being controlled D: the world's population is increasin