is the hero in The life and Strange Surprising Adventures of Robinson Crusoe of York，Mariner（also known as Robinson Crusoe ）by ______.

four great tragedies written by Shakespear are Hamlet, Macbeth, Othello and ____.

A算是Romance，不算典型的悲剧。

for art's sake was put forth by ______.

为艺术而艺术：唯美主义。

is the hero in The life and Strange Surprising Adventures of Robinson Crusoe of York，Mariner（also known as Robinson Crusoe ）by ______.

four great tragedies written by Shakespear are Hamlet, Macbeth, Othello and ____.

A算是Romance，不算典型的悲剧。

for art's sake was put forth by ______.

为艺术而艺术：唯美主义。

is the hero in The life and Strange Surprising Adventures of Robinson Crusoe of York，Mariner（also known as Robinson Crusoe ）by ______.

four great tragedies written by Shakespear are Hamlet, Macbeth, Othello and ____.

A算是Romance，不算典型的悲剧。

for art's sake was put forth by ______.

为艺术而艺术：唯美主义。

"Exit" is formed by two parts: ⸏⸏ and ⸏⸏

exit由ex和it构成

Which of the books was NOT written by Plato？

COV(aX，bY）=abCOV(X,Y)

true

E(aX-bY)=aEX-bEY

true

二次型$f(x,y,z)=Ax^2+By^2+Cz^2+2Dyz+2Ezx+2Fxy$在单位球面$x^2+y^2+z^2=1$上的最大值恰好是二次型系数矩阵的最大特征值。

(2).如果已经通过卷积公式求得(Z=aX+bY)的密度函数(f(z))，则(Z'=aX+bY+c)的密度(f'(z))可以表示为（）。

解释：由于 ( Z' ) 与 ( Z ) 是作了平移的关系，原来 ( Z ) 的分布曲线形态没有什么变化，只是向左平移了 ( c ) 个单位，从而密度函数为 ( f'(z)=f(z-c) )。