题目

More often than not, it is difficult to ______ the exact meaning of a Tang poem in English.    A. convey            B. exchange            C. transfer                D. consult 答案：A19．设0＜k＜3，关于x的一次函数y=kx+3（1-x），当1≤x≤2时的最大值是（　　）A．2k-3B．k+1C．kD．3