单词：surface-active film
单词：surface-active film 相关文章
Pat, Tim and Koko just watched a nature film. Listen, read and say. Koko:Wow! Animals are pretty amazing. Pat: Yeah. I think bees and ants are the most amazing animals. They work so hard. Which animal is your favourite? Tim: I think cheetahs are mor
小学六年级英语
Even as adults we still enjoy blowing bubbles, dont we? If youve ever wondered why blowing on a thin film of soapy water creates bubbles, this is your lucky day. All liquids have a property called surface tension. Take water, for example. Water molec
英语听力文摘 English Digest
This is Scientific Americans 60-Second Science. Im Gretchen Cuda Kroen. Got a minute? Nasty bacteria cling to the surfaces of countertops. They also stick to medical devices - like catheters - that are placed inside the human body, where they can bec
Scientific American(十一)月
BEIJING, Jan. 17 (Xinhua) -- The 23rd James Bond film, Skyfall, will debut in China on Monday, centering on a plot involving Bond, intelligence chief M and former MI6 operative Raoul Silva, the antagonist. The lengthiest 007 film, it tells of Bond's
英语新闻
By Carolyn Weaver New York 05 May 2008 New York City's largest film event, the Tribeca Film Festival, is screening 120 films this year in theaters around downtown Manhattan. The 12-day festival [which ran through May 4] was created to revive the econ
VOA标准英语2008年（五月）
On our last program, we learned how water bugs manage to stand on the surface of a pond: The pads of their feet resist contact with the water just like wax paper does. This allows the bug to rest on the thin film of surface tension that naturally cov
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