问题 填空题

踢毽子起源于汉代,高承《事物纪原》记:“今时小儿以铅锡为钱,装以鸡羽,呼为毽子,三四成群走踢…”。在如图所示的游戏中,毽子被踢出主要表明________可以改变物体的运动状态。被踢出后,毽子在上升过程中,其动能________,重力势能________(选填“增大”、“不变”或“减小”),在________的作用下,毽子最终会落向地面。

答案

力;减小;增大;重力

分析:由于力可以改变物体的运动状态,故毽子被踢出说明毽子受到了力的作用;毽子在上升过程中,速度越来越小,即动能减小,物体越来越高,故重力势能增大;毽子最终会落向地面是因为受到重力的作用。

选择题
阅读理解

High school students are some of the busiest people in the world. To get the most from all you do, you must be in control of your time. Otherwise decision that affect how well you play the game, what position you play and when you get to play will be decided for you. Your success in high school depends on your use of time. Here are some important things to remember.

·Begin each term by filling in a master plan. First fill in things you must do (classes, work, practice, etc. that you can’t change.) Then find the most effective use for these times.

·Set a regular time and place for study. This will save your time in the long run. If you have a study hall in your school, use it!

·Use daylight hours to study whenever possible. For most people for every hour of study done in daylight hours, it will take them one and a half hours to do the same task at night.

·Take breaks. Don’t plan marathon study time. Have a short rest before you study again.

·By using flash cards or summary sheets, you can use odd times to study while you’re waiting for class to start or for a friend to pick you up.

·If possible, plan study time with a partner. Choose your partner wisely however. Make sure you study, not socialize.

·Do the most difficult tasks for times when you are active. (For example, when you’re energetic, it will become easier to solve maths questions; when you’re tired, it will be impossible!)

·Make a daily checklist. Do the most important tasks first.

小题1:According to the passage, your success in high school mainly lies in _________.

A.making full use of your time

B.your hard work

C.your brainpower

D.how well you play the game小题2:We should use daylight hours to study whenever possible because __________.

A.school study halls are open to students only in the daytime

B.most people can spare more time to study in the daytime

C.it’s more difficult to study effectively at night

D.we have more important things to do than study at night小题3: On how to use our time, we should follow the following suggestions EXCEPT _______.

A.working out a complete plan for the whole term

B.keeping a good balance between study and rest

C.putting the most important tasks first

D.trying to study alone instead of working with others