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1、大学英语四级阅读理解强化集训 四级阅读理解综合测试PartPart I I ReadingReading ComprehensionComprehension (Skimming(Skimming http:/ Scanning)Scanning)Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the
2、 four choices marked A), B), C) and D). For question 8-10, complete the sentences with the information given in the passage.TooToo muchmuch VitaminVitamin dodo moremore harmharm thanthan goodgoodIf youre banking on a daily vitamin to make up for any deficiencies in your diet, you may be getting a wh
3、ole lot moreor lessthan you bargained for.Of 21 br鐱湩沪江四六级欢迎您!版权所有沪江网湩鐱ands of multivitamins on the market in the United States and Canada selected by ConsumerL and tested by independent laboratories, just 10 met the stated claims on their labels or satisfied other quality st峧http:/ Most worrisome, a
4、ccording to ConsumerL president Dr. Tod Cooperman, is that one product.The Vitamin Shoppe Multivitamins Especially for Women, was contaminated with lead. “I was definitely shocked by the amount of lead in this womans product,” he said. “Weve never seen that much lead in a multivitamin before.” Other
5、 products contained more or less of a particular vitamin than listed on the label. And some did not dissolve in the correct amount of time, meaning they could potentially pass through the body without being fully absorbed.“Half the products were fine, half were not, said Cooperman.ConsumerL is a Wes
6、tchester, N.Y.based company that independently evaluates hundreds of health and nutrition products 棊http:/ 棊and periodically publishes reviews. In the new report, released to MSNBC.com, the company purchased a selection of the popular multivitamins on the market as well as some smaller brands and se
7、nt them, without labels, to two independent laboratories to be tested.On a positive note, several of the most popular multivitamins on the market did pass muster, said David Schardt, a senior nutritionist at the Center for Science in the Public Interest, a nonprofit consumer advocacy group in Washin
8、gton, D.C. These included Centrum Silver, Members Mark Complete Multi (distributed by Sams Club), One A Day Womens 鹔頀聅溷http:/版权所有沪江网溷聅頀鹔and Flintstones Complete.“I think this confirms the advice often given: Youre safer choosing a well-known brand sold by some company or store that you have confiden
9、ce in,” Schardt said. “There are no guarantees but thats your best bet.”Random vitamin testing isnt foolproof. For instance, because ConsumerL tested several bottles from a particular lot number of each vitamin, its not a given that products produced at a different time would have the exact same con
10、tents. But detectable problems are a red flag that there could be problems with a companys production process.In the report, tests showed that The Vitamin Shoppe womens product contained 15.3 micrograms of lead per daily serving of two tablets.This amount of lead is more than 10 times the amount per
11、mitted without a warning in California, the only state that regulates lead in supplements, Cooperman said. On average, most American adults are exposed to about 3 micrograms of lead through food, wine 柢周瘷梐 http:/ and other sources, he said, and while 15.3 micrograms of lead per day may not be immedi
12、ately toxic, the mineral is stored in the body and could build up to dangerous levels with time.“I would be concerned about a woman taking a multivitamin that contains 15.3 micrograms of lead per daily serving,” said Judy Simon, a dietitian at the University of Washington Medical Center in Seattle.
13、Among other effects, she said, lead can contribute to high blood pressure.The analysis also showed that Hero Nutritionals Yummi Bears, a multivitamin for children, had 216 percent of the labeled amount of vitamin A in the retinol form, delivering 5,400 International Units (IU) in a daily serving. Th
14、ats substantially more than the upper tolerable level set by the Institute of Medicine of 2,000 IU for kids ages 1 to 3 粥駒熙讇http:/ and 3,000 IU for those 4 to 8. Because too much vitamin A can cause bone weakening and liver abnormalities, the Yummi Bears “could be potentially doing more harm than go
15、od,” Cooperman said. “Vitamin A is one of those vitamins where you really dont want to get too much.”Schardt said the lead and vitamin A findings are worrisome because vitamins are generally taken every day, potentially building up to toxic levels 梻嵫蚣http:/ and leading to problems down the line. In particular, he noted, women with high levels of lead in their bod
