请教一题英语语法Children will play with dolls equipped with personality chips,computers with in-built personalities will be regarded as workmates rather than tools,relaxation will be in front of smell- television,and digital age will have arrived.1)主干结构是几个并列的简单句：Children will play with dolls...,computers...will be regarded as...,relaxation will be in front of...,and digital age will have arrived.为什么简单句可以直接用逗号并列?不是一定要有连词吗?

不一定需要连词连接的，逗号是可以的。
比如说：
There are many students in the classroom，3/4 of them are boys.

只有两个并列成分或分句时,按要求要用 and/or 连接；如果是三个以上并列,则要求在最后一个连接成分前用连词 and/or,其他只需要用逗号隔开即可；但是当强调所有并列成分或分句同等重要的时候,也可以在每个并列成分前都加上连词.
你提出的问题中包括四个并列分句：
1. Children will play with dolls equipped with personality chips,
2. computers with in-built personalities will be regarded as workmates rather than tools,
3. relaxation will be in front of smell-television,
4. and digital age will have arrived.
* 其中最后一个分句前就有连词 and
* 之所以 and 前还有一个逗号,是由于前面的分句都很长,读者念到这里时需要略为停顿一下以便缓口气（逗号的作用就是句子中间的停顿）