
使用自给式空气呼吸器时,如果精神过度紧张,不能保持正常呼吸,会造成气体消耗量()
A.减小
B.增大
C.无影响


A.减小
B.增大
C.无影响
Second Reading
Text A has 16 paragraphs. Which paragraph contains the following information? Fill in the blanks with the corresponding paragraph numbers.
Eating Food That’s Better for You, Organic or Not
By Mark Bittman
1. In the six-and-one-half years since the federal government began certifying food as “organic,” Americans have taken to the idea with considerable enthusiasm. Sales have at least doubled, and three-quarters of the nation’s grocery stores now carry at least some organic food. A Harris Poll in October 2007 found that about 30 percent of Americans buy organic food at least on occasion, and most think it is safer, better for the environment and healthier.
2. “People believe it must be better for you if it’s organic,” says Phil Howard, an assistant professor of community, food and agriculture at Michigan State University.
3. So I discovered on a recent book tour around the United States and Canada.
4. No matter how carefully I avoided using the word “organic” when I spoke to groups of food enthusiasts about how to eat better, someone in the audience would inevitably ask, “What if I can’t afford to buy organic food?” Organic food seems to have become the magic cure for all. When people think of eating it, they think they are eating well, healthily, reasonably, even morally.
5. But eating “organic” offers no guarantee of any of that. And the truth is that most Americans eat so badly — we get 7 percent of our calories from soft drinks, more than we do from vegetables; the top food group by caloric intake is “sweets”; and one-third of nation’s adults are now obese — that the organic question is a secondary one. It’s not unimportant, but it’s not the primary issue in the way Americans eat.
6. To eat well, says Michael Pollan, the author of In Defense of Food, means avoiding “edible food-like substances” and sticking to real ingredients, increasingly from the plant kingdom. (Americans each consume an average of nearly two pounds a day of animal products.) There’s plenty of evidence that both a person’s health — as well as the environment’s — will improve with a simple shift in eating habits away from animal products and highly processed foods to plant products and what might be called “real food.”
7. From these changes, Americans would reduce the amount of land, water and chemicals used to produce the food we eat, as well as the incidence of lifestyle diseases linked to unhealthy diets, and greenhouse gases from industrial meat production.
8. The government’s organic program, says Joan Shaffer, a spokeswoman for the Agriculture Department, “is a marketing program that sets standards for what can be certified as organic. Neither the enabling legislation nor the regulations address food safety or nutrition. ”People don’t understand that, nor do they realize “organic” doesn’t mean “local.” “It doesn’t matter if it’s from the farm down the road or from Chile,” Ms. Shaffer said. “As long as it meets the standards, it’s organic.”
9. Hence, the organic status of salmon flown in from Chile, or of frozen vegetables grown in China and sold in the United States — no matter the size of the carbon footprint left behind by getting from there to here.
10. Today, most farmers who practice truly sustainable farming, or what you might call “organic in spirit,” operate on small scale, some so small that they can’t afford the requirements to be certified organic by the government.
11. But the organic food business is now big business, and getting bigger. Professor Howard estimates that major corporations now are responsible for at least 25 percent of all organic manufacturing and marketing. In 2006, sales of organic foods and beverages totaled about $16. 7 billion, according to the most recent figures from Organic Trade Association.
12. But the questions remain over how we eat in general. It may feel better to eat an organic Oreo than a conventional Oreo, but, says Marion Nestle, a professor at New York University’s department of nutrition, food studies and public health, “Organic junk food is still junk food. ”
13. Last week, Michelle Obama began digging up a patch of the South Lawn of the White House to plant an organic vegetable garden to provide food for the first family and, more important, to educate children about healthy, locally grown fruits and vegetables at a time when obesity and diabetes have become national concerns.
14. But Mrs. Obama also emphasized that there were many changes Americans can make if they don’t have the time or space for an organic garden.
15. “You can begin in your own cupboard,” she said, “by eliminating processed food, trying to cook a meal a little more often, trying to incorporate more fruits and vegetables.
16. Popularizing such choices may not be as marketable as creating a logo that says “organic. ”But when Americans have had their fill of “value-added”and overprocessed food, perhaps they can begin producing and consuming more food that treats animals and the land as if they mattered. Some of that food will be organic, and hooray for that. Meanwhile, they should remember that the word itself is not synonymous with “safe,” “healthy,” “fair” or even necessarily “good.”