题目

阅读短文，根据短文内容回答问题。 Have you had this experience? You are watching a movie. A man is shooting(射击) on the screen. The picture is so real that you think he is shooting at you. Three-dimensional(3D)movies use special technology to make pictures seem more real and exciting than two-dimensional ones. So far we can only see 3D movies in the cinema with a special screen and projector(放映机）. But soon, we will be able to watch them in our living rooms. Last month, Woods Company told reporters that it plans to bring 3D televisions to homes in the near fut自然界的水都不是纯水，日常生活用水需经自来水厂净化处理。下列净水过程中，发生了化学变化的是（  ） A．从水库中取水              B．将含有泥沙的水静置分层 C．过滤水                    D．将氯气通入水中杀菌消毒