题目

CWU The communications union Head of Research Salary: ￡55, 271 We are looking for a Head of Research to manage the CWU ResearchDepartment and Information Centre．You would be required to exercise control of all research work ofthe department and manage a team of three researchers and four support staff． The person appointed would be expected to carry out research workof a strategic nature across the range of businesses in which the CWU has orseeks membership and to contribute to the strategic thinking and direction ofthe union as a whole． You will need: proven line management skills,es在“验证机械能守恒定律”的实验中，打点计时器打点周期为T，打出的几条纸带中选出一条理想纸带，如图所示，选取纸带上打出的连续5个点A.B.C.D.E，测出A点距起始点的距离为S0，点AC间的距离为S1，点CE间的距离为S2已知重锤的质量为m，当地的重力加速度为g，则起始点O到打下C点的过程中： ①重锤重力势能的减少量为△EP＝         。 ②重锤在C点时的瞬时速度Vc=            动能的增加量为△EK＝          。 正常来说△EP      △EK（填“>”、 “<” 或“=” ）