《义务教育数学课程标准（2011年版）》在各学段中安排了四个部分的课程内容：“数与代数、图形与几何、统计与概率、综合与实践”，其中“综合与实践”内容设置的目的在于（写出所有正确结论的编号）。 ①培养学生综合运用有关知识与方法解决实际问题 ②培养学生的问题意识，应用意识和创新意识 ③积累学生的活动经验 ④加强学生知识与技能的熟悉程度 ⑤提高学生解决现实问题的能力

A. True or not, there may be a safer way to teach hitting than to make younger players pay a price for it in head injuries.
B. However, its hard to change a sports culture so connected with who we are as a country.
C. A bad head injury of Sidney Crosby, the hockeys greatest star, opened the eyes of hockey people everywhere.
D. It may also control the loss of thousands of young players who don’t enjoy that environment.
E. The USA is trying to show that its possible to teach hockey protective skills without putting 11 and 12-year-olds in greater danger. Its worth the try.

A. Hundreds of titles are published every year.
B. All kinds of people love it.
C. Some of the most successful films of recent years have been based on science fiction stories.
D. Science fiction can be found in books written hundreds of years ago.