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3 Listen carefully to the conversations and short passages [00:07.99]and choose the best answer to each of the questions. [00:13.56]1.A)She is pitiful. B)She is too shy to apply. [00:33.41]C)They are afraid of her. D)She is intelligent. [00:41.27]2.(

SSS 2011-12-20

material scientists admire spider silk for being lightweight and strong.now another arthropod product is getting into the act insect cuticle,the tough flexible material is inside insect skeleton.researchers at harvard * institute for biological inspi

VOA慢速英语2010年-Development Report - Small Drug Pouch

This is the VOA Special English Development Report. Researchers say they have found a way to extend the storage life of a drug used to treat H.I.V. Their work could give infected mothers in the developing world a new way to prevent the spread of the

VOA标准英语2013--New Documentary Explores Aluminum's 'Dark Side'

New Documentary Explores Aluminum's 'Dark Side' Aluminum is everywhere, including in products that make us feel better, safer and cleaner. Like antacids, sunscreen and antiperspirants. But Austrian filmmaker Bert Ehgartner says theres another side to

VOA标准英语2015-Powered Exoskeletons Give Assistance in Walking, Lifting

Powered Exoskeletons Give Assistance in Walking, Lifting Powered suits that could help paralyzed people walk and others lift and carry heavy loads with ease have been an inventor's dream since late 19th century. But they had to wait until the 21st ce

科学美国人60秒 SSS High Fiber Diet Keeps Intestinal Walls Intact

Your nose may be the first place you think of as a source of mucus. But mucus is a major player in your gut, too. There's antimicrobial peptides and proteins that are present in there. Bacteria live in there and forage on the carbohydrates. And it's

SSS 2009-04-24

This is scientific Americans 60-Sencond Science. I am Karen Hopkin. This will just take a minute. When you think about silk, you probably think of gossamer fibers woven into lustrous garments or decadently soft bedsheets. But silk is also prized for

我国建时速400公里高铁 助力'一带一路'互联互通

China is working on next-generation bullet trains with a maximum operational speed of 400 km per hour that will be ready by 2020 for markets linked to the Belt and Road Initiative, the country's top railway vehicle maker said. 国内最大的轨道客车

VOA标准英语2011--Automakers Turn Agro-Waste into Car Part

Scientists in Brazil are turning fruit fibers into car parts. At a recent meeting of the American Chemical Society, the researchers described their work in making the next generation of automotive parts made from natural fibers from bananas, pineappl

2007年VOA标准英语-Study Shows High Fiber Diet Not More Helpful Fi

By Melinda Smith Washington 18 July 2007 We are going to find out about two studies on breast cancer. One studied whether a diet very high in fiber and low in fat could reduce the risk of recurring breast cancer. Another study focused on women with a

VOA标准英语2010年-British Air Show Displays Innovations

The Farnborough International Airshow, held every two years in Britain, is a key event where new planes are displayed and flown and where orders are placed. This year there are indications that commercial aviation may be recovering from a year of los

VOA标准英语2010年-Turkish President Wraps Up Successful

Several accords signed to boost relations between Turkey and Cameroon Ntaryike Devine, Jr. | Yaounde, Cameroon 17 March 2010 It was the first trip to Africa for the Turkish president, who arrived in Cameroon yesterday accompanied by 120 businessmen,

VOA标准英语2014--Washington Auto Show Highlights New Technologies 华盛顿车展突出新技术

Washington Auto Show Highlights New Technologies 华盛顿车展突出新技术 WASHINGTON At this week's annual Washington Auto Show, manufacturers are featuring their standard models along with cars that point to the future, both in terms of propul

VOA标准英语2013--Giant Airship Could Move Huge Amounts of Cargo

Giant Airship Could Move Huge Amounts of Cargo The prototype unveiled in this immense World War II hangar near Los Angeles is just half the size of the final working model. But the prototype is massive, at 75-meters-long. It is wide, flattened on the

VOA标准英语2014--加纳竹制自行车得到全世界的关注

Ghana Bamboo Bikes Gain Worldwide Attention 加纳竹制自行车得到全世界的关注 APPAH, GHANA Bamboo does not get much respect in Ghana. Farmers see it as a nuisance to be cleared from their land. Construction workers use it to prop up build

VOA常速英语2015--助行走外骨骼机器人

助行走外骨骼机器人 Powered suits that could help paralyzed people walk and others lift and carry heavy loads with ease have been an inventor's dream since late 19th century. But they had to wait until the 21st century for the advanced materi

美国国家公共电台 NPR The FDA Will Decide Whether 26 Ingredients Count As Fiber

RACHEL MARTIN, HOST: The Food and Drug Administration is set to decide soon on a matter that could help you rethink fiber. Yeah, we're talking about fiber. We're told to eat a whole lot more of it. It's good for us, right? But what exactly counts as

美国国家公共电台 NPR Trump Administration Delays Most Tariffs On Steel, Aluminum

AUDIE CORNISH, HOST: The White House is postponing most of its steel and aluminum tariffs for at least another month. Tariffs were due to kick on - to kick in on a number of countries at midnight tonight. They're part of a broader effort to crack dow

美国国家公共电台 NPR Trump Trade Action Could Boost Steel And Aluminum Makers, Hurt Other Industries

DAVID GREENE, HOST: A lot of the aluminum and steel we use here in the United States is imported from other countries. And that, according to a report from the Commerce Department, is a threat to national security. Last week, department officials rec

VOA标准英语2010年-Upbeat Earnings Reports Lift US Stocks

U.S. retail sales fell half a percent in June providing more evidence that the U.S. economic recovery will slow down in the second half of the year. But the weaker than expected consumer spending appeared to have little impact on Wall Street as inves