题干

如图,由9个全等的等边三角形拼成一个几何图案,这个图案中共有平行四边形(  )

A:15个

B:14个

C:13个

D:12个

上一题 下一题 0.0难度 选择题 更新时间:2016-11-01 10:43:42

答案(点此获取答案解析)

A

同类题3

 There are many colors in nature. But do you think that a color has weight? I think you'll say 6/no". But I'm afraid you are wrong. If you don't believe it, you may do a small experiment(实验).

  First, put two objects with the same weight into two boxes. Then cover the boxes.Third, wrap(包裹) one box with a red piece of paper, the other one with a white piece of paper. OK. Now hold the boxes with your hand one by one. It is certain that you will think the red one is a little heavier.

 Why do you think so? A scientist found that different colors have different weights in man's mind. That is to say, every color has its own weight in our mind.

 The scientist told us that colors also have smell. Can you smell the color? Of course not. Then why did the scientist say S07 That is because every color stands for (代表) a kind of light with a certain wavelength,(波长). It reaches our brain through sense organs

 According to this discovery, scientists say that people accept the colors they like, and refuse the colors they hate. So your body and mind will be healthy by using the colors you like. Or you'll be nervous or even get ill.  For example (例如) ,  you like blue and hate red.  If you stay in a room with red windows, wallpaper and furniture(家具) for two hours, you'll feel you have been there for four hours. But if the room is blue, you'll feel you have been there for only an hour.  And, if a person walks out of a blue room and into a red room, his temperature will rise.That means our body temperature will change with different colors.

同类题5

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                                                                                                 刷鞋匠的绝招   曾颖
        公共汽车的门开了,一大群赶着上班的人和挑着担子背着包袱的外地小商贩蜂拥着挤上车来,投币声和刷卡声滴滴嗒嗒响成一片。毫无感情色彩的电子人机械地重复着:本车为无人售票车,请自觉刷卡或投币……
        该上的上完了,关车门。司机冲一个小个子乡下人喊:请自觉投币!
        小个子的乡下人理了理肩上挎的小木箱,把手中的木凳往地上一放,坐下,很反感地盯了一眼司机,想说什么,但忍住了。从他衣服上闪闪发光的黑色油痕和他随身携带的板凳和木箱我们看得出,他是一个刷鞋匠。
       司机并没因他的反感而放过他,嘴里又说了一声:大家没有投币刷卡的,请投币刷卡。嘴里说是大家,但眼睛只盯着刷鞋匠。刷鞋匠有些不自在了,他扬起头对司机说:“我投了的。”
     “投了怎么没听见响呢?”
     “是纸币!”
     “哼,纸币,这些乡下人……”
       司机冷笑着摇摇头,开始发动车子,准备出发。
这时,出乎他预料的一幕出现了,那个看起来一巴掌打不出三个屁的小个子乡下男人突然跳起来说,乡下人怎么了?乡下人就该被你怀疑?乡下人给钱坐车还要看你的白眼?
       司机出乎预料的遭到反击,有点懵了,他把车熄了火,扯下手套,回过头来准备认真地和刷鞋匠吵一架。他说,乡下人怎么了?乡下人了不起?乡下人 坐车可以不给钱?看你们那伙子人,上七八个人,投一两个硬币,还有五毛甚至一毛的。我还冤枉你们不成?
       刷鞋匠说,别人买不买票我不知道,我投了币买了票,你就不能冤枉我!
       车上赶着上班的人们开始鼓噪,司机觉得吵下去没意思,就转身准备继续开车,嘴里却有些不甘地说,你投没投,只有天知道了!
       说罢,戴上手套,吹起口哨,准备开车。他的表情激怒了刷鞋匠,刷鞋匠蹭地钻到驾驶台前,一把抢下车钥匙,大叫着,天知道,今天就要让天知道,把钱箱打开,验钱!
       司机仿佛是遭到小鸡突然袭击的老鹰,一下子没回过神来。待他反应过来之后,马上恢复了鹰的本色,从工具箱中取出一把铁扳手说,钥匙拿来!要不,老子把你当抢劫犯给收拾了。
       刷鞋匠两眼血红地瞪着他说,你今天就是打死我,也要把这事搞清楚!
       很快,接到报警的110来了,警察对刷鞋匠说:就算你买了票的,别闹了,行不?
        刷鞋匠梗着脖子说:不行!得开箱!
        司机扳手握得紧紧的,但当着警察的面又不敢有所作为。急着上班的人都坐别的车去了,只剩下几个不太急的人在车上看热闹。我也在车上,我要看看这件事的最后结果。警察没办法,就对司机说,你就把钱箱打开吧!遇上这犟人了,你还真没办法。
       司机说,钱箱贴了封条的,只有公司的财务人员能打开。
       警察给公司打了电话,半小时过后,公司一个经理和财务人员赶来了。经理说,这不是瞎胡闹吗?这么一箱钱,你就能认出你那一块?刷鞋匠从口袋里扯出一个牛皮纸做的钱包,里面整整齐齐地排着几张一元面额的钞票。他说,你查,里面保准有一张钱像这些钱一样,左上角有一小块黑胶布。
       经理从钱箱里果然找出了一张左上角贴着一小块黑胶布的钱,说,对,是有这么一块。好了,我宣布你是投了币的。
       刷鞋匠梗着的脖子一下子软了,他得意地冲司机一扬头说:“听着,是……投……了……的!”声音竟带有几分哽咽
车继续开。我蹭到刷鞋匠旁边坐下,问他,你咋想出这招的。刷鞋匠说,如果你遭怀疑挨白眼的次数和我一样多的话,你也会想出来的。
       你这可是毁损人民币啊!是违法行为!
       不碍事,能抠掉,一抠就掉!
        刷鞋匠一面说着,一面很认真地抠下一块,给我做示范。