【题目】设矩阵A=第一行102第二行-124第三行311B=第一行21第二行-13第三行03求(2E+AT)B 相关知识点: 试题来源: 解析 【解析】AT=第一行113,第二行021,第三行24 1。 【解析】AT=第一行113,第二行021,第三行24 1。 2E+AT=第一行313,第二行041,第三行243 ...
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(THg(g)) in the atmosphere and in evasion from soil, in 10-year-old aspen forests at the Rhinelander FACE experiment in northeastern Wisconsin, USA. ... JD Demers,JD Blum,DR Zak - 《Global Biogeochemical Cycles》 被引量: 177发表: 2013年 Influence of Aryl Esters of Indole‐3‐acetic an...
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y=lncosx^2 所以，y'=(lncosx^2)'=[1/(cosx^2)]*(cosx^2)'=[1/(cosx^2)]*(-sinx^2)*(x^2)'=[1/(cosx^2)]*(-sinx^2)*2x =-2x*tanx^2 所以，y'(√π/4)=-2*√(π/4)*tan(π/4)=-√π 第二个看不懂！！！
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Everything at once dfhyy111 【歌词同级比较级解析】 1.As sly as a fox(是同级比较级结构:as +形容词原级 + as,表示两者在某一方面程度相同,意思是“像狐狸一样狡猾”) 2.as strong as an ox(是同级比较级结构:as +形容词原级 + as...
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//Two threads could cause the same method to be bound at the same time, //but only one will actually bind it; the other still needs to return true //so things will dispatch. if(!methodAdded) { methodAdded =GPBClassHasSel(metaClass, sel); ...