【简答题】Attempts to break up this old system _______(make ) in every presidential election in the past one hundred years.
【单选题】—Were you busy last weekend? —Very. Rather than ____ time playing cards as usual, I devoted every effort to ____ an advertisement.
【单选题】如果f'(x)存在,则(∫df(x))'=( ).
【单选题】根据《建筑边坡工程技术规范》中对边坡高度的规定,对岩质边坡超出( )m,土质边坡超出15m的边皮必须进行专门的认证和特殊的设计。
【简答题】如果f'(x)存在,则[∫df(x)]'=( ). A.f(x); B.f'(x); C.f(x)+C; D.f'(x)+C