Module 5 Great People and Great Inventions of Ancient China

　　“阅读＋七选五＋完形”组合练——练题型

　　(限时：35分钟)

　　Ⅰ.阅读理解

　　(2016·兰州高三诊断)Three­dimensional printers are fast becoming everyday devices in the United States. Three­D printers are used to make everything from automobile parts to bone replacements for human patients. American research scientists are now working on creating replacements for living tissue.

　　Researchers at the Medical University of South Carolina have been working on creating and manufacturing living tissue since 2003. This process is called biofabrication (生物制造). It requires special printing equipment and a special kind of ink.

　　Traditional printers require ink to produce an image or design on a piece of paper. For their three­D printer, the South Carolina researchers prepare complex nutritious solutions they call bio­inks. Bio­inks are made of proteins and glucose (葡萄糖), which normally provides energy for most cells of the body. The researchers also add living cells taken from the animal that will receive the new, printed tissue. The bio­inks are then added to a device that researchers call the Palmetto bio­printer.

　　Sarah Grace Dennis is one of the researchers at the Medical University of South Carolina. She says new technology, like the Palmetto bio­printer, is a great help to the biofabrication process.

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