单词：closed convex surface
单词：closed convex surface 相关文章
Cindy needed to return her dress. She tried it on at home earlier. It did not fit her. Today was the last day to return it. After today, she had to keep the dress. The store closes at 8 P.M. She started driving at 7:30 P.M. It took her 20 minutes to
英语第5级听力-English Level 5
地道美语听力播客English as a Second Language Podcast (ESLPod)，是一家位于美国加州洛杉矶的英语教育研究机构推出的英文听力会话，于2005年7月23日首播， 主播Dr. Jeff McQuillan为南加州大学的语言学博士
地道美语播客
The National Oceanic and Atmospheric Administration (NOAA) confirms that some of the oil escaping from that ruptured well in the Gulf of Mexico is staying beneath the surface, raising new environmental concerns about the disaster. BP says there is no
VOA标准英语2010年(六)月
Climate change negotiators from 173 countries have agreed on an agenda after days of bickering over the scope of talks left little time for substantive discussions. The disagreement highlighted deep divisions between developing and rich countries on
英语新闻
LOS ANGELES, June 18 (Xinhua) -- Microsoft Corp. unveiled Monday a family of tablets dubbed Surface, built on Windows 8, at an event in Los Angeles. Microsoft Chief Executive Steve Ballmer introduced the company's Surface family of tablets. The devic
英语新闻
Almost every animal ever studied spends a large part of each day sleeping. Sleep is thought to play an essential role in the health of almost all animals. Because of this, scientists have long wondered how cetaceans, such as whales and dolphins, get
英语时差8，16