- 問題詳情:已知函數f(x)滿足f(x)=x2﹣2(a+2)x+a2,g(x)=﹣x2+2(a﹣2)x﹣a2+8.設H1(x)=max{f(x),g(x)},H2(x)=min{f(x),g(x)}(max(p,q)表示p,q中的較大值,min(p,q)表示p,q中的較小值),記H1(x)的最小值為A,H2(x)的最大值為B,則A﹣B=( )A.a2﹣2a﹣16 B.a2+2a﹣16 C.﹣16 D.16【回答】C知識點:*與函數的概念題型:選擇題...
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- 問題詳情:Someyearsago,a28-year-oldCalifornianwifeandmotherofthreechildrendiedfromdrinkingtoomuchwater.Herbodywasfoundinherhomeshortlyaftershetookpartinawater-drinkingcontestthatwasheldbyalocalradioshow.Called“HoldYourWeeForAWill”,thecontestorganizer...
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- 問題詳情:Morethan50yearsago,KittyGenovese,a28-year–oldwoman,wasmurderedoutsideherapartmentinNewYorkCity.ThiscouldhavebeenjustoneofthemanymurdercasesthathappenintheUS.Butsomethingsetthiscrimeapart:somenewsreportsclaimedhatneighborsandpassers-bynothing...
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- 問題詳情:在等差數列{an}中,a7=m,a14=n,則a28=【回答】3n﹣2m.考點:等差數列的*質.專題:計算題;等差數列與等比數列.分析:由等差數列的*質可得a28=3a14﹣2a7,代入已知的值可求.解答:解:等差數列{an}中,由*質可得:a28=a1+27d,3a14﹣2a7=3(a1+13d)﹣2(a1+6d)=a1+27d,∴a28=3a14﹣2a7,∵a7=m,a14=n,∴a28=3n﹣2m.故*...
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- 問題詳情:請從28-A或28-B兩組趣味實驗中任選1個作答,若兩題均作答,按28-A計分。28-A28-B(1)向一盛有少量幹*的玻璃容器中加入適量熱水,立即產生濃厚的白霧,產生此現象的原因是。(2)另取一盛有適量澄清石灰水的玻璃容器,向其中加入少量幹*,觀察到澄清石灰水變渾濁,發生反應的化學方程...
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- 問題詳情:閲讀簡答閲讀短文,根據短文內容簡要回答下列問題.Simon,a28﹣year﹣oldGermanstudent,rode5,800kilometersinChinaforhistripblog(博客).HewantedtolearnabouttheChineseDream. "What'syourChineseDream?"Thisisthequestionheaskedeverystrangerhemetonhis100﹣daytrip.Si...
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