对任意的实数,记若,其中奇函数在时有极小值,是正比例函数,函数与函数的图象如图所示则下列关于函数的说法中,正确的是( ) A.为奇函数 B.有极大值且有极小值 C.的最小值为且最大值为 D.在上不是单调函数 答案:DThe number of people invited __ fifty, but a number of them ______ absent for different reasons. A. were; was B. was; was C. was; were D. were; were