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你为何会认为每单位产出劳动力成本指数的变化是宏观经济的一个极为有用的滞后指标？

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通用除草剂公司通过它的专利产品Weed—ex垄断了化学除草剂产品市场。但是。专利马上就要到期了。你对该行业有何预期？尤其是。通用除草剂公司的产品价格、销售额与利润前景及其竞争对手的利润前景有何变化？你认为该市场处于其行业生命周期的哪个阶段？

Passage Two
You may have heard some of the fashion industry horror stories: models eating tissues or cotton balls to hold off hunger, and models collapsing from hunger-induced heart attacks just seconds after they step off the runway.
Excessively skinny models have been a point of controversy for decades, and two researchers say a model&39;s body mass should be a workspace health and safety issue. In an editorial released Monday in the American Journal of Public Health, Katherine Record and Bryn Austin made their case for government regulation of the fashion industry.
The average international runway model has a body mass index (BMI) under 16-low enough to indicate starvation by the World Health Organization&39;s standard. And Record and Austin are worried not just about the models themselves, but about the vast number of girls and women their images influence.
"Especially girls and tens", says Record. "Seventy percent of girls aged 10 to 18 report that they define perfect body image based on what they see in magazines." That&39;s especially worrying, she says, given that anorexia(厌食症)results in more deaths than does any other mental illness, according to the National Institute of Mental Health.
It&39;s commonly known that certain diseases are linked with occupations like lung disease in coal miners. Professional fashion models are particularly vulnerable to eating disorders resulting from occupational demands to maintain extreme thinness.
Record&39;s suggestion is to prohibit agents from hiring models with a BMI below 18.
In April, France passed a law setting lower limits for a model&39;s weight. Agents and fashion houses who hire models with BMI under 18 could pay $82,000 in fines and spend up to 6 months in jail. Regulating the fashion industry in the United States won&39;t be easy, Record says. But with the new rules in France, U.S. support could make a difference. "A designer can&39;t survive without participating in Paris Fashion Week", she says, adding, "Our argument is that the same would be true of New York Fashion Week."
What do Record and Austin say about fashion models&39; body mass？

A. It has caused needless controversy.
B. It is focus of the modeling business.
C. It is but a matter of personal taste.
D. It affects models' health and safety.

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What does Record expect of New York Fashion Week？

A. It will create a completely new set of rules.
B. It will do better than Paris Fashion Week.
C. It will differ from Paris Fashion Week.
D. It will have models with a higher BM

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How does Carl Weinberg view the current oil price plunge？

A. It is one that has seen no parallel in economic history.
B. Its negative effects more than cancel out its positive effects.
C. It still has a chance to give rise to a boom in the global economy.
D. Its effects on the global economy go against existing economic laws.

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