[填空题](据研究人员统计) ______, Europe’s population will continue to decline for decades.

[填空题](据研究人员统计) ______, Europe’s population will continue to decline for decades.

[单项选择]大小行星悬浮在太阳系边缘，极易受附近星体引力作用的影响。据研究人员计算，有时这些力量会将彗星从奥尔特星云拖出。这样，它们更有可能靠近太阳。两位研究人员据此分别作出了以下两种有所不同的断定：一、木星的引力作用要么将它们推至更小的轨道，要么将它们逐出太阳系；二、木星的引力作用或者将它们推至更小的轨道，或者将它们逐出太阳系。
如果上述两种断定只有一种为真，可以推出以下哪项结论
A. 木星的引力作用将它们推至最小的轨道，并且将它们逐出太阳系
B. 木星的引力作用没有将它们推至最小的轨道。但是将它们逐出太阳系
C. 木星的引力作用将它们推至最小的轨道。但是没有将它们逐出太阳系
D. 木星的引力作用既没有将它们推至最小的轨道，也没有将它们逐出太阳系

[单项选择]As demands on the telecommunication system continued to increase, the limitation of current technology became apparent.
A. 随着对远距离通讯系统的需求与日俱增，现代通讯技术的局限性显得十分突出。
B. 随着对远距离通讯系统的需求与日俱增，限制现代通讯就显而易见了。
C. 随着对远距离通讯系统的需求与日俱增，当今流行的技术很显然有局限了。
D. 由于持续增加了电信系统的需求，流行技术的限制就变得明显了。

[填空题]Universities and colleges are schools that continue a person’s (educate) ______ beyond high school.

[简答题]种群(population)

[简答题]动态人群（dynamic population）

[填空题]Slower population increase is largely responsible for the slight slowdown in the growth of the labor force.

[单项选择]Who sponsored the conference on population
A. Cairo.
B. The United Nations.
C. The World Bank.
D. The World Health Organization.

[填空题]What is the online population of Japan

[填空题]Which country has the largest online population

[填空题]
The advantages and disadvantages of large population have long been a subject of discussion among economists (46) . To feed a large population, inferior land must be cultivated and the good land worked intensively. (47) . Other economists have argued that a large population gives more scope for specialization and the development of facilities such as ports, roads and railways, (48) .
One of the difficulties in carrying out a worldwide birth control program lies in the fact that official attitudes to population growth vary from country to country depending on the level of industrial development and the availability of food and raw materials. In the developing country where a vastly expanded population is pressing hard upon the limits of food, space and natural resources, (49) .In a highly industrialized society the problem may be more complex. A decreasing birth rate may lead to unemployment