西藏是我国领土重要的组成部分，历代中央政府都十分重视对它的管辖。下列有关史实，叙述正确的是（）。 ①西藏正式成为中央政府直接管辖的行政区域开始于元朝 ②雍正时期在西藏设立驻藏大臣代表中央政府与达赖、班禅共同管理西藏 ③1951年西藏和平解放，为西藏与全国一起实现共同进步与发展创造了基本前提 ④目前，我国在西藏地区实行的基本民族政策是民族区域自治
西藏是我国领土重要的组成部分，历代中央政府都十分重视对它的管辖。下列有关史实，叙述正确的是（）。
①西藏正式成为中央政府直接管辖的行政区域开始于元朝
②雍正时期在西藏设立驻藏大臣代表中央政府与达赖、班禅共同管理西藏
③1951年西藏和平解放，为西藏与全国一起实现共同进步与发展创造了基本前提
④目前，我国在西藏地区实行的基本民族政策是民族区域自治
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用尿糖定性试验检查糖尿病病人和正常成年人各500名，结果糖尿病病人中有300例阳性，200例阴性，正常成年人有50例阳性，450例阴性。如果某人尿糖定性试验阴性，你认为排除其患有糖尿病的把握为（）
A.50/450×100/100=11.11%
B.200/450×100/100=44.44%
C.450/500×100/100=90%
D.400/550×100/100=81.82%
E.450/650×100/100=53.85%
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Flying across the country the other day, I sat next to a retired Air Force colonel, and we had a pleasant conversation about love of flying, travel and grandchildren and for him, of retirement itself. "Yeah," he said, "there’s only one thing that would make me give this up. " "What’s that" "If Hillary or Jan Fonda runs for president, I’m going to work full time to beat her. " I told him I knew Hillary. She doesn’t even need a last name now. And she’s no Jane Fonda. "Well," I concluded before we began talking about planes and kids again, "I think you are going to get your chance. I think she’s going to run. " I once wrote, with total sincerity, that I thought Hillary Rodham Clinton had the political instincts of a stone. I also wrote that I thought she had marginalized her husband’s chances of being an important president. He blew that by naming his wife to head the task force to work out a national plan, and she decided to work in secret with battalions of "experts" who came up with a plan four times as long as the European constitution. Then, after taking her lumps for that, she decided to run, as a Democrat, for the US Senate from New York, a state she had always thought was a nice place to visit. She is now far and away the Democratic front-runner for president in 2008. Her national numbers are getting better, inch by inch, day by day. Now, a slight majority—52 percent in a couple of polls—say they are likely or very likely to vote for Hillary for president. True, 47 percent, including my friend the colonel, still say "Never. " But her national approval-disapproval rate is now about 55 to 39, compared with 46 to 48 for President Bush. The odds are still against her. So are most of the odds-makers, beginning with Joe Klein of Time Magazine, chronicler of the Clintons in fact and fiction. He believes a Hillary candidacy will polarize the country the way the reign of the Clintons polarized us in the 1990s.
A．The Rise and Rise of HillaryB．Hillary’s Political CareerC．People’s Ambivalence Toward Hillary CandidacyD．A Retired Colonel’s View on Hillary’s Running for Presidency
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