题目

—“Frog”， Mo Yan's latest novel, please! —Sorry, it ________.But it will come out again soon. A．sold out  B．is sold out  C.has sold out  D.were sold out 答案：B已知f(x)=x3+x-2在P处的切线与直线y=4x-1平行，则切点P的坐标是（    ） A.(1,0)                                              B.(2,8)C.(1,0)或（-1，-4）                           D.（2，8）或（-1，-4）