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Lesson 77 A successful operation 一例成功的手术 First listen and then answer the question. 听录音，然后回答以下问题。 Did the doctors find out how the woman died? The mummy of an E
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Frame In time division multiplexing systems, Frame is a sequence of time slots each containing a sample from one of the channels carried by the system. The frame is repeated at regular intervals, (nor
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By Cathy Majtenyi Nairobi, Kenya 26 December 2007 Watch Operation Smile Operation Smile is an international group of medical professionals who perform reconstructive surgery, free of charge,for children with facial deformities. This year, Operation S
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Chinese citizens have reacted with anger and alarm at news of a massive illegal vaccine operation uncovered in Shandong province. The illegal vaccine ring involved hundreds of people, and affected 24 provinces and cities, local media said. 近日，山
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BEIJING, Feb. 19 (Xinhua) -- The People's Bank of China (PBOC) on Tuesday started a 28-day repurchase operation worth 30 billion yuan (4.8 billion U.S. dollars) for the first time since June, according to a statement on its website. A repurchase oper
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