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2012年1月11日，位于肯尼亚首都内罗毕的中国中央电视台非洲分台当地时问11日晚8时正式开播，这是央视在海外建成的首个分台。( )
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人尝出苯基硫脲(PTC)的能力(味觉正常)由显性等位基因T决定，不能尝出PTC(味盲)由其隐性基因t决定。如果一个群体中有24%是味觉正常的纯合子，40%是味觉正常的杂合子，t的频率是多少
Thirty-one million Americans are over 60 years of age, and twenty-nine million of them are healthy, busy, productive citizens. By the year 2030, one in every five people in the United States will be over 60. people are members of the fastest-growing minority in this country. Many call this the "graying of America". In 1973, a group called the "Gray Panthers" was organized. This group is made up of young and old citizens. They are trying to deal with the special problems of growing old in America. The Gray Panthers know that many elderly people have health problems; some cannot walk well, others cannot see or hear well. Some have financial problems; prices are going up so fast that the elderly can’’t afford the food, clothing, and housing they need. Some old people are afraid and have safety problems. Others have emotional problems. Many elderly are lonely because of the death of a husband or a wife. The Gray Panthers know another fact, too. Elderly people want to be as independent as possible. So, the Gray Panthers are looking for ways to solve the special problems of the elderly. The president of the Gray Panthers is Maggie Kuhn, an active woman in her late 70s. She travels across the United States, educating both young and old about the concerns of elders. One of the problems she talks about is where and how elders live. She says that Americans do not encourage elders to live with younger people. As far as Maggie Kuhn is concerned, only elders who need constant medical care should be in nursing homes. Maggie Kuhn knows that elders need education, too. She spends lots of time talking to groups of older Americans. She encourages them to continue to live in their own houses if it is possible. She also tells them that it is important to live with younger people and to have children around them. This helps elders to stay young at heart. One of the problems Maggie Kuhn talks about is_____.
内容重要并紧急需要打破常规优先传递处理的文件，叫做急件。( )
在信息高度发达的社会，领导干部素质的提高主要不是靠到实践中去锻炼，而是靠掌握信息技术。( )
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