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.
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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。
一个带负电荷的蛋白质可牢固地结合到阴离子交换剂上,因此需要一种比原来缓冲液pH值 和离子强度 的缓冲液,才能将此蛋白质洗脱下来。