题目

一个质量为2kg的物体同时受到两个力的作用,这两个力的大小分别为2N和6N,当两个力的方向发生变化时,物体的加速度大小可能为 (    ) A.1m/s2          B.2m/s2           C.3m/s2               D.4m/s2 答案：BCD 解析: 略Mr. Smith’s decision to attend ____ ceremony tomorrow can be seen as ____ gesture of his intention to improve the relationship. A. the; the                    B. a; a                          C. the; a                       D. a; the