A: the; a
B: a; the
C: the; the
D: a; a
举一反三
- It is estimated that by 2050, there could be . A: more than 6 billion people B: no more than 6billion people C: up to 9 billion people D: over 9 billion people
- It is expected that the world's population will reach ______ by the end of the century. A) 2 billion people C) 80 percent of all people B) 4.4 billion people D) 6.4 billion people A: It is expected that the world's population will reach ______ by the end of the century. B: 2 billion people C: 4.4 billion people D: 80 percent of all people E: 6.4 billion people
- 中国有12亿多人口,陆地自然资源人均占有量低于世界平均水平。() A: China has a<br/>population of more than 1.2 billion, and its land natural resources<br/>per capita are lower than the world’s average. B: China’s<br/>population is 1.2 billion and the natural resources on the land per<br/>head are lower than the world’s average level. C: The 1.2 billion<br/>people in China have lower land natural resources than in the world<br/>each. D: The land natural<br/>resources 1.2 billion Chinese have are less than the world has.
- It took（）years for world population to grow from 1 billion to 3 billion. A: 100 B: 115 C: 130 D: 145
- While ____ the sun, the satellite has sent more than four billion bits of information back to earth.
内容
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Over a billion people lack access to clean drinking water, and over 2 billion people live without adequate sanitation, leading to the deaths of 5 million people, from preventable waterborne disease.
- 1
With approximate 1.2 billion people in 2016, Africa accounts for about __________ of the world's human population.
- 2
As visa restrictions are lowered, Chinese people are expected to spend more than＄300 billion on tourism.
- 3
________ the Internet is an important part of our daily life, about 3.9 billion people are still not online. A: If B: Because C: Unless D: Although
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Suppose the only revenue taken in by the government is in the form of income tax, and the tax rate is 10 percent. If aggregate income is $800 billion, and government outlays are $100 billion then the government budget has A: a deficit of $20 billion. B: a surplus of $20 billion. C: neither a surplus nor a deficit. D: a deficit of $80 billion.