题目

With the rapid social development, the Internet now provides social networks that include online movies and videos．The major television networks have much less control over your mind and their broadcasts for entertainment and, more importantly, advertising．It has long been known that television’s audience will spend more time on the Internet than watching TV．People have found another means of entertainment by going to websites which seem to satisfy their specific interests more completely．This isn’t very good news for the television networks．     The influence of people using (趣味题)分子是由原子组成的，原子又是由电子、质子与中子等更微小的粒子所构成．若以、和分别代表电子、质子与中子，则下面各图各粒子的示意图中，表示阳离子的是 [　　] A． B． C． D．