题目

 It is not difficult to ______ Mr. Huang from among a crowd because he is above average height. A. leave out                       B. pick out                                               C. run into                   D. look into 答案：从高处以速度V0水平抛出一物体，要使物体有最大的水平距离，应选取下列数据中的哪一组：（    ）A．h=10m，V0=5m/s       B．h=5m，V0=10m/sC．h=20m，V0=2.5m/s     D．h=2.5m，V0=20m/s