题干

三角形ABC中,内角A,B,C所对边a,b,c成公比小于1的等比数列,且sinB+sin(A﹣C)=2sin2C.
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同类题2

任务型阅读

    Do you know what a big dream is? Does a big dream show one's future? Or, is a big dream something that provides only entertainment? Children dream big dreams, but there are three barriers to realizing dreams____

The self

    Immediately following the birth of a big dream, a negative self-talk takes over and gives all the reasons why it cannot happen. This voice inside of people is the ego(自我).It's there for protecting and should be listened to. Sometimes it is right, but more often it is wrong____ That's why only a handful of people make their dream come true

Family and friends

    Family and friends are a lot the ego.____ so they will often list all the reasons why the big dreams won't come true. Sometimes, family and friends destroy dreams of those they love most, out of their own fear of those left behind.

____

    If one gets past the first two barriers, one has to face the world. It is the last and the most terrible barrier. In the past, big dreamers were locked up and sometimes even killed when they were shown to the world. Fortunately, in most of the world today, big dreamers just get laughed at ____When children feel confident and then try their best, they will be ready to accept any failure. The truth is that every great dreamer whose dreams have never seen the light of success knows failure well. They simply fail until they succeed

A. The world

B. The future

C. Most people are influenced by it

D. They want to protect those they love

E. And their big dream is to be a rock star or a famous artist

F. They often kill them before they ever have a chance to grow

G. The way to realize a big dream is with confidence and action

同类题5

课外阅读

      上帝有一天心血来潮,来到他所创造的土地上散步,看到农田里的麦子结实累累,感到非常开心。一个在麦田里的农夫向上帝请安,说:“仁慈的上帝呀!终于来了。这五十年来,我没有一天停止祈祷,企盼着你的降临,终于来了。” 上帝说:“五十年来,你都在祈祷,到底是在祈求什么呢?” 

     “我总是在祈求风调雨顺,祈祷今年不要有大风雨,不要下雪,不要地震,不要干旱,不要有冰雹,不要有虫害,可是不论我怎么祈祷,总是不能如愿!”农夫说。 

       农夫跪下来,吻上帝的脚:“全能的主呀!可不可以在明年允诺我的请求,只要一年的时间,不要风,不要雨,不要烈日与灾害,别人的田我不管,能不能给我一年的时间?” 

      上帝说:“好吧!明年如你所愿。” 

      第二年,农夫的田地果然结出许多麦穗,由于没有任何狂风暴雨、烈日与灾害,麦穗比平常多了一倍,农夫 _________,欢喜地等待收成的那一天。 到了收成的时刻,奇怪的事情发生了,农夫的麦穗里竟然没有结出一粒麦子。 农夫找到了上帝,问道:“仁慈的上帝,这是怎么一回事,是不是搞错了某些部分?”  

      上帝说:“我没有搞错任何事情,一旦避开了所有的考验,麦子就变得无能了。对于一粒麦子,努力奋斗是不可避免的,风雨是必要的,烈日是必要的,蝗虫是必要的,它们可以唤醒麦子内在的灵魂;人的灵魂也和麦子的灵魂相同,如果没有任何考验,人也只是一个空壳罢了。”