题目

Mr Li is kind _____ us. But sometimes he is kind ______ serious(严肃).          A. to, of    B. with, to    C. of, to    D. of, of 答案：A地形剖面图可以更直观表现地面上沿某一方向地势的起伏坡度的陡缓 ．（判断对错）