某工厂有一种材科,可加工甲、乙、丙三种型号机械配件共240个.厂方计划由20个工人一天内加工完戚.并要求每人只加工一种配件.根据下表提供的信息。解答下列问题: (1)设加工甲种配件的人数为x,加工乙种配件的人数为y,求y与x之间的函数关系式。 (2)如果加工每种配件的人数均不少于3人.那么加工配件的人数安排方案有几种?并写出每种安排方案. (3)要使此次加工配件的利润最大,应采用(2)中哪种方案?并求出最大利润值.___ the fact that his initial experiments had failed, Pro. White persisted (坚持) in his research. A. Because of B. As to C. In spite of D. In views of