与血的运行没有直接关系的脏是(    )
   A．心    B．肺    C．脾    D．肝    E．肾

若( ) A． B． C．-cotx+sinx+C D．cotx+sinx+C

A.174.24.96:6088/Latex/latex.action?latex=XGludFxsZWZ0KCBcZnJhY3sxfXtzaW5eezJ9eH0gKzFccmlnaHQpZFxzaW54PQ%3D%3D'
B.C.174.24.96:6088/Latex/latex.action?latex=LVxmcmFjezF9e3Npbnh9K3NpbngrQw%3D%3D'
D.E.174.24.96:6088/Latex/latex.action?latex=XGZyYWN7MX17c2lueH0rc2lueCtD'
F.-cotx+sinx+C

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已知E(X)=-1，D(X)=3，则E[3(X2-2)]=( )． A．9 B．6 C．30D．36

A.

B.9
C.6

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