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如圖4,在△ABC中,AB=AC=8,DBC上一動點(DB、C不重合),DEAB,DFAC,則四邊形DEAF的周長是
A.24B.18C.16D.12

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觀察下列兩組數(shù)據(jù)的折線圖(圖5),你認(rèn)為下列說法中正確的是
A.兩組數(shù)據(jù)平均數(shù)一樣,標(biāo)準(zhǔn)差一樣
B.兩組數(shù)據(jù)平均數(shù)一樣,a組離散程度較大
C.b組數(shù)據(jù)平均數(shù)大于a組,方差一樣
D.兩組數(shù)據(jù)平均數(shù)一樣,b組離散程度較大

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計算=         

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反比例函數(shù)的圖象經(jīng)過點(2,-6),則k的值為         .

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將直線y=2x-4向上平移5個單位后,所得直線的表達(dá)式是                  

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科目: 來源: 題型:閱讀理解

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(嘗試) to throw a stone or two at one of Mr. Flower’s __38__ . They managed to resist the temptation(抵制誘惑) 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(灌木叢) 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(距離). 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(戰(zhàn)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.
【小題1】
A.toB.byC.ofD.with
【小題2】
A.factoryB.officeC.schoolD.work
【小題3】
A.bed-roomsB.living-roomC.reading-roomD.glass-houses
【小題4】
A.strongB.weakC.limitedD.strange
【小題5】
A.impossibleB.unableC.possibleD.somewhere
【小題6】
A.far away fromB.in or close toC.into or out ofD.a(chǎn)t or out
【小題7】
A.in no wayB.in a wayC.in the wayD.in many ways
【小題8】
A.successfulB.cheerfulC.wonderfulD.careful
【小題9】
A.harmB.wrongC.goodD.wonder
【小題10】
A.watchedB.walked toC.waited forD.run after
【小題11】
A.towardsB.overC.out ofD.into
【小題12】
A.manyB.muchC.moreD.lots of
【小題13】
A.laughedB.lookedC.calledD.surprised
【小題14】
A.earthB.sticksC.stonesD.branches
【小題15】
A.pick upB.catchC.play withD.throw
【小題16】
A.inB.offC.outD.up
【小題17】
A.ideaB.friendC.guestD.word
【小題18】
A.whereB.there whereC.on whichD.there
【小題19】
A.a(chǎn)nnouncementB.wordsC.sentencesD.message
【小題20】
A.peaceful timesB.further troubleC.more happinessD.questions

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如圖7,將一張矩形紙片對折再對折,然后沿著圖中的虛線剪下一個角(虛線與折痕成45°角),打開,則所得的平面圖形是           .

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在圖8所示的平面直角坐標(biāo)系中,以A為一頂點,線段BC為一邊,構(gòu)造平行四邊形,則該平行四邊形另一個頂點D的坐標(biāo)為                    .

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(8分)某市今年計劃修建一段全長1500米的景觀路,為了盡量減少施工對城市交通的影響,實際施工時,每天的工效比原計劃增加20%,結(jié)果提前2天完成這一任務(wù),求原計劃每天修路多少米?

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(9分)如圖9,△ABC是等邊三角形,D點是AC的中點,延長BCE,使CE=CD.
(1)用尺規(guī)作圖的方法,過D點作DFBE,垂足是F(不寫作法,保留作圖痕跡);
(2)求證:BF=EF

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