在一定区城内，生物与环境所形成的统一的整体叫做生态系统．下列有关说法错误的（　　）

    In the past black people in South Africa ____(live) a miserable life. They could not vote to choose their ____(leader). They could not get jobs they wanted. The parts of town in which they had to live ____ (decide) by white people. They lived in the ____(poor) areas in the country and could not get jobs they wanted. Nelson Mandela, a modern hero, called black people ____ fight against white people to make black and white people equal. He said “We were put in a position ____we had either to accept we were less important,____ fight the Government. We chose to attack the law. We first broke the law____a way which was ____(peace); when this was not allowed…only then ____we decide to answer violence with violence.”

我国已成为世界上高铁发展最快，技术最先进的国家之一．在节能技术上，高铁动车组采用了再生制动方式：动车到站前先停止供电，由于 ____，动车会继续向前运行，电机线圈随车轮转动并在磁场中切割磁感线产生 ____，将 ____能转化为电能，自动输入电网．