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青春期龈炎牙龈表现为
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牙龈固有层胶元纤维束，位于牙颈部周围的游离龈中，环形排列
A：条件(1)充分，但条件(2)不充分． B：条件(2)充分，但条件(1)不充分． C：条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分． D：条件(1)充分，条件(2)也充分． E：条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分． 方程|x2-4x+1|-1=a有且仅有一正根一负根． (1)-1＜a＜0；(2)a＞2．
A：条件(1)充分，但条件(2)不充分． B：条件(2)充分，但条件(1)不充分． C：条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分． D：条件(1)充分，条件(2)也充分． E：条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分． logab+logba≤-2． (1)a＞1且0＜b＜1；(2)a＞1且b＞1．
Around a dozen young men dressed as beautiful girls and competing on TV by singing and dancing have grabbed the eyeballs of the nation. At the same time, they have stoked intense controversy. Liu Zhu, one of the cross-dressing Happy Boys contestants, is among the 50 finalists in the show’s district competition in Chengdu. He and others have convincingly presented themselves as not only good-looking girls but also as talented performers. In doing so, they have gained millions of young fans nationwide. They also have lots of critics. Among them are many parents with teenage sons. They worry that their children will follow the example of the "drag queens" on TV and ruin their futures. So what is your opinion Should TV stations allow transvestites, or young men dressed as girls publicly, to perform and compete YES There is no law against young men dressing as girls, so there is no reason to prohibit them from doing so on TV. 1) Chinese culture is full of artistic performances in which men dress as women or vice versa. Peking Opera performer Mei Lanfang is just one fine example. He played women his whole life and was regarded as one of the greatest Chinese artists. 2) The Happy Boys contestants’ drag performance doesn’t mean they are homosexual or transsexual. They may be doing it only because they find it interesting and artistically challenging. A good example is the former "Happy Girl" Li Yuchun. She has been well received for her wholesome tomboy look. 3) Today’s China is an unprecedentedly open and tolerant society. Homosexual or transgender lifestyles are not prohibited by law, or regarded as a disease. Young people have the right to express their sexual orientation. NO Today’s China and Chinese people are not yet ready to accept transvestites on TV. 1) It is one thing to say we respect people’s privacy and their sexual orientation. But flaunting homosexuality on TV is probably a little too much for China at this moment. The power of media Could influence and mislead other young people into adopting such a lifestyle. 2) There still exists wide-spread prejudice against homosexuality in China. Parents worry that their young sons might copy the drag performers and ruin their future. It’s understandable that parents don’t want their children to fail victims to discrimination. 3) The success of the transvestite performers may lead to a wave of "fake transvestites" who dress up as women simply to impress judges. This would be very disrespectful of real transvestite artists. The author’s attitude towards drag performance might be summarized as ______.
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