17、单选 下列积分的敛散性说法错误的是(). ()-|||-(4分)-|||-A .(int )_(0)^1dfrac (dx)(sqrt {1-{x)^2}} 发散-|||-B J01-x^4发散-|||-C . (int )_(0)^1dfrac (dx)({x)^2sqrt (1-x)} 发散-|||-D (int )_(0)^1dfrac (dx)(xsqrt {1-x)} 发散