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Other colleges are 1 to stand out from their peers. The race to attract students with the most modern networks and the hottest systems has 2. Some business 3 are receiving free portable computers. In an always-connected mode, they can get information anytime and anywhere they need. One university is even giving its freshman new smartphones to 4 the student experience and prepare them for success in a rapidly changing world.

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Another hero from the 1 in Tuscon was Dory Stoddard. Dory gave his life for his wife, Mavy. Dory and his wife had been friends since childhood and when Dory heard shots 2 he immediately fell on top of his wife to shield her from the 3 . At the 4, the priest said:" Dory didn't die a hero; he lived a hero." Long known for his 5 spirit and love of humanity, Dory Stoddard died as he had always lived, assisting others.

The 1 stories of heroes help remind us that 2 people can do 3 things, whether it is in the 4 or as part of everyday life. We honor the firemen, the policemen and the average citizen by recognizing their 5. Perhaps, even more 6, we honor them by working to change the circumstances that led to their death. By honoring them, we can be 7 by them. Will we be heroes when circumstancescall on us to act heroically?_8___, we will.

天然蛋白质一般均含_____、_、_、_____等二级结构。

双缩脲在碱性溶液中能于硫酸铜反应，生成_色物质，可在_处比色。