题干

已知A是△ABC的一个内角,sinA+cosA=
1
5
,则sinAcosA=____,tanA=____.
上一题 下一题 0.0难度 选择题 更新时间:2015-03-16 05:09:54

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\ufe63 1225,\ufe63

同类题1

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    As Internet users become more dependent on the Internet to store information, are people remember less? If you know your computer will save information, why store it in your own personal memory, your brain? Experts are wondering if the Internet is changing what we remember and how.

    In a recent study, Professor Betsy Sparrow conducted some experiments. She and her research team wanted to know the Internet is changing memory. In the first experiment, they gave people 40 unimportant facts to type into a computer. The first group of people understood that the computer would save the information. The second group understood that the computer would not save it. Later, the second group remembered the information better. People in the first group knew they could find the information again, so they did not try to remember it.

    In another experiment, the researchers gave people facts to remember, and told them where to find the information an the Internet. The information was in a specific computer folder (文件夹). Surprisingly, people later remember the folder location (位置) better than the facts. When people use the Internet, they do not remember the information. Rather, they remember how to find it. This is called “transactive memory (交互记忆)”

    According to Sparrow, we are not becoming people with poor memories as a result of the Internet. Instead, computer users are developing stronger transactive memories; that is, people are learning how to organize huge quantities of information so that they are able to access it at a later date. This doesn’t mean we are becoming either more or less intelligent, but there is no doubt that the way we use memory is changing.

同类题3

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    Apple Seeds

    Circulation(发行量): 1 Year, 9 Issues(—期)

    Cover Price: $44.55

    Price for You: $33.95

    Product Description: Apple Seeds is an award winning magazine filled with stories for kids aged from 7 to 9. The cover is very soft, providing durability(耐用性)that allows each issue to be enjoyed for many years to come. Besides, there is a big surprise for you-it's being sold at a more favorable discount than usual.

    Better Life

    Circulation: 1 Year, 12 Issues

    Cover Price: $44.55

    Price for You: $15.00

    Product Description: Designed for those who have a strong interest in personal lifestyle. Better life is an America's complete home and family service magazine. It offers help with food, recipes, decorating(装潢), building, gardening, family health, money management and education.

    Humor Times

    Circulation: 1 Year, 12 Issues

    Cover Price: $36.00

    Price for You: $11.95

    Product Description: Humor Times is for those who love to laugh! Full of cartoons and humor columns, it shows up in your mailbox once a month and keeps you smiling all year round! In today's world, you need a reason to laugh. So let's find it in Humor Times.

    News China

    Circulation: I Year, 12 Issues

    Cover Price: $47.88

    Price for You: $19.99

    Product Description: News China is the English edition of China Newsweek. The magazine covers the latest Chinese domestic news in politics, society, environment, culture, sports and travels, etc. It is the first comprehensive news magazine for readers interested in China.

同类题5

阅读下列议论文选段,完成后面小题。

低头是一种智慧

       ①雪松懂得低头,能够造就一片山坡的翠绿;海鸥懂得低头,可以忍受狂风暴雨的冲击。学会低走,懂得屈伸自如,生活会给我们意想不到的惊喜。雪松懂得低头,能够造就一片山头的翠绿;海鸥懂得低头,可以忍受狂风暴雨的冲击。所谓“大丈夫能屈能伸”,只有我们学会低头,懂得伸屈,生命中才总会有绝处逢生的惊喜。

       ②四面楚歌中,当那寒光闪闪的长剑划过虞姬那白皙的脖颈,留下一抹鲜艳的红色时,你只剩吟唱那“力拔山兮气盖世,时不利兮骓不逝”的无可奈何;你只会长啸“此天亡我,非战之过也”的末路悲声。面对滚滚的乌江水,昔时勇猛盖世的西楚霸王,如今却为何落得个自刎的下场?虽有李清照歌颂你:“生当作人杰,死亦为鬼雄。”然而你可知“胜败兵家事不期,包羞忍耻是男儿”?你可知“江不东子弟多才俊,卷土重来未可知”?

       ③当时的天下,是一个群雄逐鹿的舞台。只是遗憾,你始终磨不平你那突出的棱角,始终学不会那“遇方则方,遇圆则圆”的灵动。只能惋惜,你是山,一座从不肯低头弯腰的山。这样的性格,便注定了你很难有绝处逢生的惊喜。

       ④纵然你的决定是对于尊严的维护,是对于耻辱的抗争。可若你懂得低头是一种智慧,渡过乌江,以你的才能,以你的勇敢,卷土重来,历史或许就会被改写。

       ⑤与你不同,司马迁却深谙低头的智慧。他的“苟且偷生”,他的能屈能伸,成就了中华历史上的一部伟大著作《史记》。他明白,低头是一种绝处求生的智慧,是一种可以在逆境中实现自身价值的超脱。

       ⑥穿越历史的时空,我们领悟个中的智慧。重新站上现实的土地,我们要学会重新审视自己,学会低下自己高昂的头颅。这绝非懦弱和畏缩,而是经营人生的阅历与智慧,是修身处世的风度与气概,是超越自身极限的信心与勇气。我们要做的,就是面对困难挫折,不乱闯硬干,不讳疾忌医,坦然接受,从头再来。即便痛苦,但痛苦又何尝不是上天赐予我们换个视角看世界的机会呢?

       ⑦无所谓风雨兼程,只要有“低头”的睿智,就可以呵护好你的梦。人生如一泓水,温存而灵动。学会低头,懂得屈伸自如,这种智慧会让我们在困境中得到柳暗花明的转机!