问题 填空题

彩色电视画面是由______、______、______三种色光混合而成的;画一幅色彩艳丽的画,必须至少要红、______、______三种颜色的颜料,显然色光的混合和颜色的混合是不相同的.

答案

色光的三原色是:红、绿、蓝,颜料的三原色是:品红、黄、青,又叫红、黄、蓝.

故答案为:红;绿;蓝;黄;蓝.

材料分析题

李明是某校九年级学生。暑假的一天,他和叔叔家上小学的弟弟李浩做完作业到大街上玩。在村委会大院中,他看到墙上的选民榜中有爸爸妈妈和爷爷奶奶等人的名字。在公告栏中,他看到自己的叔叔还是乡人大代表的候选人。这时,弟弟李浩缠着他问:“上面怎么没有咱俩的名字呢?” 回到家,爷爷告诉李明他要在选举日那天慎重地投出自己的一票。可是奶奶却说:“都这么大年纪了,管他谁当选呢,用不着操那份闲心。”

(1)假如你是李明,你该怎样给李浩作出解释呢?

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                            

(2)假如你是李明,你可以用哪些知识来劝说奶奶?

                                                                                                                                                            

                                                                                                                                                             

                                                                                                                                                             

(3)假如李明的叔叔被选为乡人大代表,你觉得李明可以向叔叔说些什么?

                                                                                                                                                               

                                                                                                                                                               

问答题