(2016·江苏)有A、B两小球,B的质量为A的两倍。现将它们以相同速率沿同一方向抛出,不计空气阻力。图中①为A的运动轨迹,则B的运动轨迹是 (A)① (B)② (C)③ (D)④ 答案:A 【名师解析】将它们以相同速率沿同一方向抛出,A、B两小球均做斜抛运动,其轨迹相同,选项A正确。 Walking alone in the quiet town, Helen thought she _____ have invited John to enjoy the peace together. A. can’t B. needn’t C. should D. might