[填空题]40 percent of population growth in America comes from immigration which is a heavy burden on the society.

[填空题]40 percent of population growth in America comes from immigration which is a heavy burden on the society.

[单项选择]An annual population growth rate of 0.57 percent in the last decade, points to the necessity of further maintaining the family- planning policy and keeping the country’s population growth rate at a reasonable level.
The net increase in the population was 130 million from 1990 to 2000, 56 million more than in the 2001～2010 period. So it is clear that family planning has achieved a great deal.
Given its great population, China needs to continue the family-planning policy as its population will continue to grow over the next two decades before it peaks at a predicted 1.5 billion.
The publication of detailed figures from the sixth national census on Thursday shows that the proportion of residents under 14 dropped by 6.29 percentage points in the last 10 years and those aged between 15 and 59 decreased by 1.91 percentage points.
During the same period, the number of people over the age 60 increased by 2.93 percentage points.
The increasingly heavier burden
A. 56 million
B. 57 million
C. 74 million
D. 130 million

[单项选择]In a certain population, 40 percent of all people have biological characteristic X; the others do not. If 8,000 people have characteristic X, how many people do not have X ？（）
A. 3200
B. 4800
C. 12，000
D. 16，000
E. 20，000

[单项选择]

About two percent of the population of the United States is of Asian origin—some five million people. Chinese, Japanese, and Philippines form the largest groups. However, there are also significant numbers of Asian-Indians, Pakistanis, Koreans, and Vietnamese now living in America. As a result of the war in Vietnam, some 350,000 refugees from that country have entered the United States since the early 1970s．
Chinese and Japanese workers were imported into the United States by employers in the late nineteenth and early twentieth centuries．Most of the Chinese settled in California, where they were employed mainly in heavy industries, such as mining and railroad construction. They were faced with intense prejudice and discrimination, especially from lower-class white people, who saw them as a source of threat to their jobs. The retreat of the Chinese into distinct Chinatowns was not primarily their choice, but was enforced by the hostility they faced. Since Chinese imm
A. About 35,000.
B. About 250,000.
C. About 350,000.
D. About 25,000.

[单项选择]Though it is mere 1 to 3 percent of the population, the upper class possesses at least 25 percent of the nation’s wealth. This class has two segments: upper-upper and lower-upper. Basically, the upper-upper class is the "old rich"—families that have been wealthy for several generations—an aristocracy of birth and wealth. Their names are in the Social Register, a listing of acceptable members of high society. A few are known across the nation, such as the Rockefellers, Roosevelts, and Vanderbilts. Most are not visible to the general public. They live in grand seclusion, drawing their income from the investment of their inherited wealth. In contrast, the lower-upper class is the "new rich". Although they may be wealthier than some of the old rich; the new rich have hustled to make their money like everybody else beneath their class. Thus their prestige is generally lower than that of the old rich, who have not found it necessary to lift a finger to make their money, and who tend to look
A. they keep away from the general public
B. they spend most of their time abroad
C. they don’t communicate with any people
D. they move frequently from place to place