1.退隐面（垂直于主投影面之平面）2.后退面

Blue

Blue is the world’s favorite color. It is also the color most often associated with intellect and authority. Most 1) uniforms are blue. In Greek and Roman 2) mythology, blue was the color of the sky

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US Army Corps of Engineers Fights Receding Mississippi Waters It's another day of intense heat in the midwest United States, and another day without rain on the Mississippi river. On board the U.S. Army Corps of Engineers survey ship, the MV Pathfind

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United Nations officials say flood waters in Namibia and Zambia are receding and regional weather forecasters say they currently have no projections for heavy rains in the catchments of the Zambezi and Okavango. The focus is shifting toward assistin

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VOA标准英语2012--Floods Receding in Nigeria

Floods Receding in Nigeria The floods have started to recede in Nigeria, however, millions of people across 14 states have been affected. More than 350 people are reported dead. The U.N. and the Nigerian government are launching a new effort to share

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VOA标准英语2012--US Coast Guard Monitors Receding Mississippi River Levels

US Coast Guard Monitors Receding Mississippi River Levels Crewmembers on board the U.S. Coast Guard Cutter Gasconade are struggling to keep traffic flowing on the Mississippi River. As the water level beneath them continues to drop, the green and red

发表于:2019-01-14 / 阅读(31) / 评论(0)

VOA标准英语2012年(十二月)

英语美文：最好的爱

The Best Kind of Love I have a friend who is falling in love. She honestly claims the sky is bluer. Mozart moves her to tears. She has lost 15 pounds and looks like a cover girl. I'm young again! she shouts exuberantly. As my friend raves on about he

发表于:2019-03-13 / 阅读(205) / 评论(0)

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brake hose dummy coupling

camphonomic acid

capsule filling machine