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如图,AB为⊙O的直径,点C在⊙O上,AD⊥CD于点D,且AC平分∠DAB,求证:

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    Yu Xu, one of China's first female fighter pilots who could fly a J-10 jet, died during a flight training in Tangshan in North China's Hebei province on Saturday. Almost all major media outlets have sung high praise for Yu's spirit. People's Daily said: "She died for the peace and happiness of so many families ... The name of Yu and other heroes will be carved not only in stone, but also in the hearts of millions." However, despite being a news hit, a lot of social media platforms still pay much attention to pop stars, no matter their weddings, problematic marriages or just datings. The day Yu died, she did not even make it to the top-10 hot topics on micro blogs.

    Some netizens have criticized such people for being too cold to news about heroes who defend our country. They even quoted from the book, Amusing Ourselves to Death, to express their concerns over people being misled by new media while referring to pop stars as "xi zi", a contemptuous(轻蔑的) term used for entertainment stars in the old days.

    However, it is unnecessary to shame those netizens who were busy reading about film stars and other celebrities. We live in the age of social and new media, where the celebrities usually draw greater public attention than real heroes. This is partly because the agents(经纪人) of celebrities(名人)are very skilled at using social tools to expand their fan base for commercial gains.

    Of course, we should admit the great influence entertainment has on people's minds and it helps the media industry make money. Pop stars do take up a lot of our time, and especially many young people waste their spare energy on them, their new songs, new movies, even rumors about their love life and other scandals. The domestic media industry needs improvement, some entertainment stars should improve their public images, but it is not right to call them "xi zi".

    The media may be encouraging people to pay greater attention to celebrities than military heroes, but that does not necessarily mean people pay less respect to heroes than stars. The increasing number of reports about the pilot shows the heroes are worth people's added attention, and they get it.

Greater attention to celebrities doesn't mean less respect for heroes

Introduction to the news

In an unexpected accident during a fight training Yu Xu ____ her life in Tangshan, Hebei Province on Saturday, who was a female fighter pilot of the J-10 jet.

Different attitudes toward the news

Almost all major media outlets have thought____ of Yu's spirit including People's Daily, which commented that Yu's name will____ down in history with other heroes.

A lot of social media platforms cared little about Yu's death, which ____to enter the top-10 topics on micro blogs.

Criticism for not caring about heroes

Being cold to the news about heroes makes some netizens even disrespectfully call pop stars “xi zi” to show their____

Reasons for greater attention to stars

In order to make money, the agents of celebrities are trying to ____ more fans for their employers with their social skills.

The media industry uses the influence of____ to make money and keeps trying to satisfy people's  ____about pop stars' privacy(隐私).

Conclusion

More and more reports about the pilot have____up, which reflects the heroes____ people's added attention and they get it.

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失根的兰花

陈之藩

    ①先生一家约我去费城郊区的一个大学里看花。汽车走了一个钟头的样子,到了校园;校园美得像首诗,也像幅画。依山起伏,古树成荫,绿藤爬满了一幢幢小楼,绿草爬满了一片片坡地;除了鸟语,没有声音。像一个梦,一个安静的梦。

    ②花圃有两片,里面的花,种子是从中国运来的。一片是白色的牡丹,一片是白色的雪球;如在海的树丛里,闪烁着如星光的丁香,这些花全是从中国来的呀!由于这些花,我自然而然地想起北平公园里的花花朵朵,与这些简直没有两样;然而,我怎么也不能把童年时的情感再回忆起来。我不知为什么,总觉得这些花不该出现在这里,它们的背景应该是今雨轩,应该是谐趣园,应该是故宫的石阶,或亭阁的栅栏。因为背景变了,花的颜色也褪了,人的情感也弱了。泪,不知为什么流下来。

    ③十几岁,就在外面漂泊,泪从来不曾这样不知不觉地流过。在异乡见过与童年完全相异的东西,也见过完全相同的花草;同也好,不同也好,我总未因异乡事物而想过家。到渭水滨,那水,是我从来没见过的,我只感到新奇,并不感觉陌生;到咸阳城,那城,是我从来没有见过的,我只感觉到它古老,并不感觉伤感。我曾在秦岭捡过与香山上同样红的枫叶,在蜀中我也曾看到与大庙中同样的古松,我也并未因而想起过家。我曾骄傲地说过:“我,到处可以为家。”

    ④然而,自至美国,情感突然变了;在夜里的梦中,常常是家里的小屋在风雨中坍塌了,或是母亲的头发一根根白了;在白天的生活中,常常是不爱看与故乡不同的东西,而又不敢看与故乡相同的东西。我这时才恍然悟出,我所谓的到处可以为家,是因为蚕未离开那片桑叶;等到离开国土一步,即到处不可以为家了。

    ⑤花搬到美国来,我们看着不顺眼;人搬到美国来,也是同样不安心;这时候才忆起,故乡土地的芬芳与故乡花草的艳丽。我曾记得,8岁时肩扛小镰刀跟着叔叔下地去割金黄的麦穗,而今这童年的彩色版画,成了我一生中不朽的绘画。

    ⑥古人说“人生如萍”──在水上漂流;那是因为古人未出国门,没有感觉离国之苦,萍还有水可依;以我看:人生如絮,飘零在此万紫千红的春天。

    ⑦宋末画家郑思肖画兰,连根带叶均飘于空中。人问其故,他说:“国土沦亡,根着何处?”国,就是根,没有国的人,是没有根的草,不待风雨折磨,即自行枯萎了。

    ⑧我十几岁就无家可归,并未觉其苦。十几年后,祖国已破,却觉出个中滋味了。不是有人说过“头可断,血可流,身不可辱”吗?我觉得,应该是“身可辱,家可破,国不可亡”。