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科目: 来源: 题型:

如图4,在△ABC中,AB=AC=8,DBC上一动点(DBC不重合),DEABDFAC,则四边形DEAF的周长是
A.24B.18C.16D.12

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观察下列两组数据的折线图(图5),你认为下列说法中正确的是
A.两组数据平均数一样,标准差一样
B.两组数据平均数一样,a组离散程度较大
C.b组数据平均数大于a组,方差一样
D.两组数据平均数一样,b组离散程度较大

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计算=         

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反比例函数的图象经过点(2,-6),则k的值为         .

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将直线y=2x-4向上平移5个单位后,所得直线的表达式是                  

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科目: 来源: 题型:阅读理解

Mr. Flower was well-known around for growing the best flowers of the year and his four glass-houses were taken good care of. These glass-houses were close to a public path, which was always used ___36__ children and young people walking to and from __37__. Boys of about thirteen years of age, especially, were often tempted(尝试) to throw a stone or two at one of Mr. Flower’s __38__ . They managed to resist the temptation(抵制诱惑) when Mr. Flower was around, but the temptation often seemed to be too __39__ when Mr. Flower was __40__ to be seen. For this reason, Mr. Flower did his best to be __41__ his glass-houses at the beginning and end of the school days.
However, it was not always possible for him to be on guard at these times.  Mr. Flower had tried __42__ to prevent(阻止) the damage to his glass; but nothing that he had done had been__43__. He had been to the school to complain(抱怨) to the headmaster, but this had not done any__44__. He had hidden in the bushes(灌木丛) and __45__ those boys that threw stones __46__ his garden, but the boys could run __47__ faster than he, and they even __48__ at him at a distance(距离). He had even walked along the path and picked up all those __49__that he could find so that the boys would have nothing to __50__, but they soon found others, or threw lumps of earth instead.
Then just as he had given __51__ hope of winning the battle(战斗), a truly wonderful __52__ came up to him. He set up a large notice board made of good strong wood, some meters away from the glass-houses __53__ it could be clearly seen from the path. On the board he painted the __54__ : DO NOT THROW AT THIS NOTICE. After this, Mr. Flower had no __55__ .The boys were much more tempted to throw stones at the notice board than at the glass-houses.
【小题1】
A.toB.byC.ofD.with
【小题2】
A.factoryB.officeC.schoolD.work
【小题3】
A.bed-roomsB.living-roomC.reading-roomD.glass-houses
【小题4】
A.strongB.weakC.limitedD.strange
【小题5】
A.impossibleB.unableC.possibleD.somewhere
【小题6】
A.far away fromB.in or close toC.into or out ofD.at or out
【小题7】
A.in no wayB.in a wayC.in the wayD.in many ways
【小题8】
A.successfulB.cheerfulC.wonderfulD.careful
【小题9】
A.harmB.wrongC.goodD.wonder
【小题10】
A.watchedB.walked toC.waited forD.run after
【小题11】
A.towardsB.overC.out ofD.into
【小题12】
A.manyB.muchC.moreD.lots of
【小题13】
A.laughedB.lookedC.calledD.surprised
【小题14】
A.earthB.sticksC.stonesD.branches
【小题15】
A.pick upB.catchC.play withD.throw
【小题16】
A.inB.offC.outD.up
【小题17】
A.ideaB.friendC.guestD.word
【小题18】
A.whereB.there whereC.on whichD.there
【小题19】
A.announcementB.wordsC.sentencesD.message
【小题20】
A.peaceful timesB.further troubleC.more happinessD.questions

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如图7,将一张矩形纸片对折再对折,然后沿着图中的虚线剪下一个角(虚线与折痕成45°角),打开,则所得的平面图形是           .

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在图8所示的平面直角坐标系中,以A为一顶点,线段BC为一边,构造平行四边形,则该平行四边形另一个顶点D的坐标为                    .

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(8分)某市今年计划修建一段全长1500米的景观路,为了尽量减少施工对城市交通的影响,实际施工时,每天的工效比原计划增加20%,结果提前2天完成这一任务,求原计划每天修路多少米?

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(9分)如图9,△ABC是等边三角形,D点是AC的中点,延长BCE,使CE=CD.
(1)用尺规作图的方法,过D点作DFBE,垂足是F(不写作法,保留作图痕迹);
(2)求证:BF=EF

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