题干

在方程组2x+y=1-mx+2y=2中,若未知数x,y满足x+y>0,则m的取值范围在数轴上的表示应是如图所示的(  )

A:

B:

C:

D:

上一题 下一题 0.0难度 选择题 更新时间:2015-11-13 08:52:20

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B

同类题1

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    When US teenager Jake Olson isn't playing football or golf for his high school, he's often offering inspiration(灵感)through his new book about his own life.

    These activities might be too much for the average 16-year-old to deal with, but Jake is blind. When people ask him how he can possibly play golf without being able to see the ball, he says he is thankful for his father's guidance.

It seems apparent that his early experience playing sports as a person with sight and muscle(肌肉) memory— repeating behaviors over and over until they become second nature — have also enabled Jake to hit the ball quite well.

    Jake was born with a rare kind of eye cancer that took away the vision from his left eye when he was a baby and eventually his right eye, in 2009, when he was 12 years old. Rather than letting the disease hold him back, Jake used his loss of sight and his faith as sources of motivation(动力).“If I was going to sit on the couch all day, feeling sorry for myself, I wasn't going to do anything. I decided that I was going to go out and persevere (坚持不懈).” he said.

    It was with that mind-set that the student from Orange Lutheran High School in California was able to write his first book, Open Your Eyes: 10 Uncommon Lessons to Discover a Happier Life. “It's about opening the readers' eyes to their true talent in life and making sure that they use all the abilities that they have,” Jake said.

    Jake's father, Brian Olson, said the family is impressed with what he has done with his life, including showing people that they can get through hardships. “Your darkest hour can soon become your brightest, and with every setback, there's a setup,” Jake said. “In every one of us, there's more potential than we can ever imagine, and it really is a choice.”

同类题4

阅读下面的文字,完成小题

鞋匠菩子

沙克

    寒风就像冰箱里拿出的快刀,往所有的缝隙里戳着嗖嗖的冷。鞋匠菩子用老式的三块瓦棉帽捂住头和脸,把小区大门外的鞋摊挪到墙角处。

    我把穿了六年多的一双磨砂牛皮鞋递给菩子。这双鞋已被他修补过几次,鞋跟磨塌了他给打上鞋掌,鞋底和鞋帮间脱口了他手工用针线缝合。这次还是让他打鞋掌。我右脚的鞋跟磨得厉害,每年都要给皮鞋打一次右掌,不然走路时脚底往外侧歪。菩子用一只半椭圆形的黑色橡皮掌在鞋跟上试试,又换一个小些的试试,都觉得不满意。他从铁柜子中拿出一个小木盒,翻了个底,找出一块与鞋底同质顺色的马蹄形牛筋掌。不过太大了,形状与鞋跟的磨塌处不相干,于是他用剪刀把它剪成半椭圆形,用锉子把鞋跟磨塌处的灰尘锉掉,表面稍稍锉毛,用黄胶涂抹鞋跟与鞋掌,放到脚边风干一两分钟。

    一阵旋风像水流一样冲过来,被我从头包到腿的大棉衣挡着。菩子的身体似乎歪了一下,鼻涕流到嘴唇上,他撩起蓝布围裙的一角擦掉鼻涕。“你凑合着打个掌就行了,旧皮鞋值不着用功。”我有点替他着急。“那不行,靠手艺吃饭马虎不得的。”一两分钟的空隙里,菩子看到左脚那只鞋子的侧面有一点点绽缝,拿到修鞋机上哒哒哒地缝好。

    然后,他把涂过胶的鞋掌和右鞋跟压在一起,接着,再把残剩的牛筋掌剪下一小块,先用锉子把两面使劲锉毛,锉下来的粉末落在他腿上铺着的帆布上,再用削刀削成扁扁的楔状,两面涂上胶用嘴巴吹一吹,塞进鞋掌与鞋跟间合不拢的三角缝中,再放在铁鞋托上用小钉锤给锤实了。在楔状小块塞进去之前,他已经把帆布上的粉末撮起来撒进三角缝中,这样鞋掌、楔状小块和鞋跟间就粘得严密实在了。

    贴着鞋跟侧面的弧度,他用削刀把鞋掌和楔状小块削平。“好了。”他把鞋子递给我查看。

    我问他,“多少钱?”他说,“不用了,拿走吧。”我说,“那不行,你得收钱。”他说,“给两块钱吧。”我说,“给你五块。”他摆摆手说,“打个小鞋掌就两块,对哪个都一样鞋匠菩子

    这是午饭后,没什么人拿鞋子来修,菩子修补着寄放在他这里的一堆鞋子。我没什么事,穿那么多衣服不怕冷,和菩子聊天也不影响他做事。

    “我爸爸有一双在部队时发的军皮鞋,从1948年穿到1977年,我接着穿就是穿不坏。现在的皮鞋连布鞋都不如,像草鞋,几个月就穿坏了,穿年把就得换新的。”我起了话头。

    “过去的军皮鞋是厚牛皮做的,是头层皮,鞋头还衬着钢板,能不结实么。现在的牛皮鞋,是用剥离过几层的牛皮做的,有的薄得像牛皮纸,黏衬上别的仿皮材料,看起来厚实一点,其实吃不住穿的。”菩子答着话。

    “再薄的真皮鞋,也不至于穿半载一年就坏了啊。”

    “现在的做工哪能和过去比,糊弄出鞋样子,表面好看就行。好多皮鞋说是真皮鞋,其实是合成革的材料……”

    菩子扶着鞋摊柜站起来,伸展一下腰身。他只有一米四几,被小儿麻痹症致残的腿根本伸不直。他摸着裤腰上的牛皮带说:“你看过去的东西,是没剥层的牛皮做的,用两代人都断不了。我父亲十八岁时开始用的,用到他死,我又用了三十多年。”他的牛皮带表面像蜘蛛网似的,跟他皴裂的手掌一模一样,连颜色都一样,灰不拉几中带点黄。

    “哎,菩子,假如皮鞋都像过去那么牢固,皮鞋厂和皮鞋店就完蛋了,产量销量要减少几倍。”

    “呵呵,那我做鞋匠的也完蛋了,养不活老婆儿子了。”

    菩子的老婆是个身强力壮的哑巴。他的儿子在职业技术学院读建筑工程专业,是个能说会道的大块头,还在学校的业余拳击队里当队长。菩子特别为儿子骄傲:“我们家原来有五口人,四个是残疾人,父母死了儿子长大了,我也老了,五十九岁了。以后我们家再有五口人时,健康人就占多数啦。”

    我拿起装着磨砂牛皮鞋的塑料袋起身离开。走到小区门口时,想起什么,就又走了回来。菩子坐在那里,埋头摇着修鞋机补鞋子,矮小的身子被鞋摊柜遮得没了影子。多少年来,他一直被鞋摊柜挡在后面。

    “菩子,你坐得偏一些,别让鞋摊柜挡住你的人。”

    菩子乐意接受我的意见。我帮他把鞋摊柜往大广告伞的旁边移了几十厘米,对着马路现出菩子的身体。

(有删改)