制度创新是人类社会发展进步的一个重要表现。
（1）为适应新的统一形势，秦朝创立了一套封建专制主义的____ 制度。
（2）为改变用人弊端，隋唐时期创立并逐步完善了____ 。
（3）英国资产阶级革命后，开始确立了____ 的资产阶级统治。

    As is known,____ (play) team sport is popular all over the world, and participation in sporting____ (activity), such as football or basketball, is ____(benefit) to us in many aspects.

    To begin____, it can build up our bodies and help us keep fit physically,____in turn enables us____(avoid) overweight and other problems, such as high blood pressure.____ (add), it is a good way to develop some useful team skills, teamwork and strategies ____(include). Last but not ____(little), we often play sport for social reasons, for it is a good way of making new friends.

    ____, everyone should take an active part in team sports.

什么是电池短路？短路时会出现什么现象？