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以下选项中可作为C语言合法常量的是()。
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听力原文： This week, the World Health Organization released its first country-by-country look at environmental health risks. (21) These include pollution, dangers in the workplace and ultraviolet radiation from the sun. They also include risks like noise, unsafe agricultural methods, climate change and people's behavior. (23) The report says making environmental conditions healthier could prevent thirteen million deaths each year. Research on close to two hundred countries found that the worst affected include Angola, Burkina Faso, Mali and Afghanistan. The study found that two major environmental risks cause more than ten percent of the deaths in twenty three countries. (22) These risks are unsafe water and indoor air pollution from burning wood, coal or animal waste for fuel.
The World Health Organization reported the environmental health risks, NOT including
对组织持中间态度、观点和意向不明朗的公众群体属于()
What feeling does the narrator have toward the child？
Analysts cite a variety of masons for this return to the nest. The marriage age is rising, a condition that makes home and its pleasantness particularly attractive to young people. A high divorce rate and a declining remarriage rate are sending economically pressed and emotionally hurt survivors back to parental shelters. For some, the expense of an away-from-home college education has become so excessively great that many students now attend local schools. Even after graduation, young people find their wings clipped by skyrocketing housing costs.
Living at home, says Knighton, a schoolteacher, continues to give security and moral support. Her mother agreed, "It's ridiculous for the kids to pay all that money for rent. It makes sense for kids to stay at home." But sharing the family home requires adjustments for all. There are the hassles over bathrooms, telephones and privacy. Some families, however, manage the delicate balancing act. But for others, it proves too difficult. Michelle Del Turco, 24, has been home three times — and left three times. "What I considered a social drink, my dad considered an alcohol problem," she explains. "He never liked anyone I dated, so I either had to hide away or meet them at friends' houses."
Just how long should adult children live with their parents before moving on？ Most psychologists feel lengthy homecomings are a mistake. Children, struggling to establish separate identities, can end up with "a sense of inadequacy, defeat and failure." And aging parents, who should be enjoying some financial and personal freedom, find themselves stuck with responsibilities. Many agree that brief visits, however, can work beneficially.
According to the author, there was once a trend in the U.S.
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