相關E.的文學知識

 E-mailEnglish

 E-mailEnglish

問題詳情: E-mailEnglish_____usestwotypesofwords.  A.mainly        B.strongly         C.gradually【回答】A知識點:副詞題型:選擇題...

 E-mail,aswellastelephones,

 E-mail,aswellastelephones,

問題詳情: E-mail,aswellastelephones,____  animportantpartindailycommunication.A.isplaying   B.haveplayed   C.areplaying   D.play 【回答】A知識點:主謂一致題型:選擇題...

 E-mails,though

 E-mails,though

問題詳情: E-mails,though_________exposedtomisleadinginformation,areconsideredfarmoreconvenientthantraditionalletters.A.occasionallyB.especiallyC.originallyD.naturally【回答】A知識點:副詞題型:選擇題...

E-mail,aswellastelephones,

E-mail,aswellastelephones,

問題詳情:E-mail,aswellastelephones,________animportantpartindailycommunication.A.isplaying         B.haveplayed        C.areplaying      D.play【回答】A知識點:現在進行時及其被動式題型...

已知f(x)=ex-e-x,g(x)=ex+e-x(e=2.71828…)(1)求[f(x)]2-[g(x)]...

已知f(x)=ex-e-x,g(x)=ex+e-x(e=2.71828…)(1)求[f(x)]2-[g(x)]...

問題詳情:已知f(x)=ex-e-x,g(x)=ex+e-x(e=2.71828…)(1)求[f(x)]2-[g(x)]2的值;(2)若f(x)f(y)=4,g(x)g(y)=8,求的值.【回答】解析(1)[f(x)]2-[g(x)]2=(ex-e-x)2-(ex+e-x)2=(e2x-2+e-2x)-(e2x+2+e-2x)=-4.(2)f(x)f(y)=(ex-e-x)(ey-e-y)=ex+y+e-x-y-ex-y-e-x+y=[ex+y+e-(x+y)]...