问题
填空题
已知两个共点力的大小分别为3 N、5 N，则它们合力的最大值为 N,最小值为 N.
答案
8N 2N
题目分析：当两力方向相同时，合力最大，为8N，当两力方向相反时，合力最小，为2N，
点评：做本题的关键是理解合力最大最小的临界条件，非常简单，
搜题请搜索小程序“爱下问搜题”
已知两个共点力的大小分别为3 N、5 N，则它们合力的最大值为 N,最小值为 N.
8N 2N
题目分析：当两力方向相同时，合力最大，为8N，当两力方向相反时，合力最小，为2N，
点评：做本题的关键是理解合力最大最小的临界条件，非常简单，
| 阅读理解。 | ||||
| It's summer movie time again. And heroes are ready to try their strength and magic on the silver screen. Check out our list of four films that look most promising to young audience.
| ||||
| 1. According to the passage, if you want to see a film whose leading actor is Jackie Chan, you will see the film on ______. | ||||
[ ] | ||||
| A. June 4 B. June 16 C. June 30 D. July 7 | ||||
| 2. In Spider Man 2, Aunt May's trouble is caused by ______. | ||||
[ ] | ||||
| A. Peter Parker B. Mary Jane C. Dr. Otto Octavius D. Spider-Man | ||||
| 3. Which of the following films is set in ancient Britain? | ||||
[ ] | ||||
| A. Harry Potter and the Prisoner of Azkaban. B. Around the world in 80 Days. C. Spider-Man 2 D. King Arthur |