Which of the following can best summarize the main idea of the text?

A．Social network has negative impact on well-being.

B．Facebook is bad for users' in-the-moment mood.

C．Whether people can actively use social network.

D．Whether Facebook will make you sad depends on how you use it.

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参考答案

答案解析

主旨题。文章第一段点题，指出在社交网络中过度关注他人理想化的生活会让你对现实感到痛苦。第二段至第六段介绍了相关实验，最后一段表明实验结果：使用社交网络本身并不会使人忧伤，而是过度关注他人发表在网上的理想化生活状态才会使人对现实感到痛苦。因此，正确答案是D。

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1 Questions are based on the following passage.
Latino youths need better education for Arizona to take full advantage of the possibilities their exploding population offers. Arizona´s fast-growing Latino population offers the state tremendous promise and a challenge. Even more than the aging of the baby boomers, the Latino boom is funda-mentally reorienting the state´s economic and social structure.
Immigration and natural increase have added 600,000 young Latino residents to the state´s population in the past decade. Half of the population younger than 18 in both Phoenix and Tucson is now Latino. Within 20 years, Latinos will make up half of the homegrown entry-level labour pool in the state´ s two largest labour markets.
What is more, Hispanics are becoming key economic players. Most people don´t notice it, but Latinos born in Arizona make up much of their immigrant parents´ economic and educational deficits. For example, second-generation Mexican-Americans secure an average of 12 grades of schooling where their parents obtained less than nine. That means they erase 70 percent of their parents´ lag behind third-generation non-Hispanic Whites in a single generation.
All of this hands the state a golden opportunity. At a time when many states will struggle with labour shortages because of modest population growth, Arizona has a priceless chance to build a populous, hardworking and skilled workforce on which to base future prosperity. The problem is that Arizona and its Latino residents may not be able to seize this opportunity. Far too many of Ari-zona´s Latinos drop out of high school or fail to obtain the basic education needed for more ad- vanced study. As a result, educational deficits are holding back many Latinos--and the state as well.
To be sure, construction and low-end service jobs continue to absorb tens of thousands of Latino immigrants with little formal education. But over the long term, most of Arizona´s Latino citizens remain ill-prepared to prosper in an increasingly demanding knowledge economy.
For the reason, the educational uplift of Arizona´s huge Latino population must move to the centre of the state´s agenda. After all, the education deficits of Arizona´s Latino population will severely cramp the fortunes of hardworking people if they go unaddressed and could well undercut the state´s ability to compete in the new economy. At the entry level, slower growth rates may create more competition for low-skill jobs, displacing Latinos from a significant means of support. At the
higher end, shortages of Latinos educationally ready to move up will make it that much harder for knowledge-based companies staff high-skill positions.
The Latino population is changing Arizona´s _____

A．aging problem

B．educational system

C．economic structure

D．financial deficits

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2 What can be inferred from the third paragraph?

A．The Latino population in Arizona is made up of Hispanics and Mexican-Americans.

B．The first-generation Latinos are immigrants instead of being born in America.

C．70 percent of the first-generation Latinos had less schooling than nine years.

D．The educational system used to be in favour of the non-Hispanic Whites.

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3 The underlined part "educational deficits" (Para.4) most probably means that

A．the state did not put much money into education

B．many Latinos are too poor to obtain education

C．education is not a profitable enterprise

D．many Latinos are not well-educated

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