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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.

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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 ______.

A. critical
B. serious
C. impersonal
D. unclear

Confucius, it’s safe to say, would be disappointed with how people in the U. S. view educator, s, More than 300 Chinese teachers have been learning first-hand that Americans tend not to hold educators in as high a regard as many Chinese people do. These teachers are in the U.S. thanks to a partnership between China’s Education Ministry and the U. S. College Board. They are teaching Chinese language and culture to U. S. high school students and are themselves learning a lot--like how little U. S. teachers are paid, and how much teachers must cater to the needs of their students. "This country doesn’t value teachers, and that upsets me," Zheng Yue, a Chinese teacher working in the U.S. state of Oklahoma, told The New York Times. "Teachers don’t earn much, and this country worships making money. In China, teachers don’t earn a lot either, but it’s a very honorable career. " Teachers like Zheng have also learned that students are treated differently in the U. S.. Once, while trying to explain a vocabulary quiz, a student who was not paying attention asked, "What are we supposed to be doing" Zheng patiently repeated her instructions, but she said later how surprised she had been. "In China, if you teach the students and they don’t get it, that’s their problem," she told The Times. "Here if they don’t get it, you teach it again." In the end, Zheng says she’s not overly ambitious about what she is trying to accomplish in the classroom. "I want my students to have a sweet, sweet memory of taking Chinese," she said. "They won’t remember a lot of words, but I want them to remember the beauty of the language and the culture. \ Which of the following can best serve as the title for the passage

A. Experiencing the life of an American teacher.
B. A partnership between China’s Education Ministry and the U. S. College Board.
C. The relationship between the language and the culture.
Differences between teachers in China and Americ

男,60岁。左侧后牙自发痛2天。一年多来该侧后牙遇冷或热痛。2天前开始,夜痛不能人睡。查6°龋深,探敏感,叩痛(+),不松动。冷测引起剧痛。 该患牙的诊断最可能是

A. 深龋
B. 三叉神经痛
C. 急性牙髓炎
D. 可复性牙髓炎
E. 慢性牙髓炎急性发作

请编写函数fun(),它的功能是计算:s=(1-ln(1)-ln(2)-ln(3)-…-ln(m))2 s作为函数值返回。 在C语言中可调用log(n)函数求ln(n)。log函数的引用说明是double log(double x)。 例如,若m的值为15,则fun()函数值为723.570801。 注意:部分源程序给出如下。 请勿改动主函数main和其他函数中的任何内容,仅在函数fun的花括号中填入所编写的若干语句。 试题程序: #include <conio.h> #include <stdio.h> #include <math.h> double fun(int m) main() clrscr(); printf("%f\n",fun(15));

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