问题 单项选择题

甲某的外祖父与乙某的父亲是亲兄弟,丙某的外祖母与丁某的祖母是亲姐妹。则( )。

A.甲某与乙某、丙某与丁某的婚姻均有效
B.甲某与乙某、丙某与丁某的婚姻均无效
C.甲某与乙某的婚姻无效,丙某与丁某的婚姻有效
D.甲某与乙某的婚姻有效,丙某与丁某的婚姻无效

答案

参考答案:A

解析: 根据《婚娴法》的规定,直系血亲和三代以内的旁系血亲禁止结婚。结合本题意,只要能够计算出结婚的双方是否属于三代以内旁系血亲即可做出选择。旁系血亲是没有直接血缘关系、两者可以找到同源的亲属,如兄弟姐妹。三代以内旁系血亲是指以自己为一代,由己身向上数至同源,以最远者作为代数。如兄弟姐妹就是二代以内旁系血亲,堂兄弟姐妹就是三代以内旁系血亲。

单项选择题
单项选择题

In promising to fuse media as diverse as television, telephone communication, video games, music and data transmission, the era of digital convergence goes better than yesterday’s celebrated "information superhighway". Yet achieving this single technology is far from straightforward. There are currently three major television broadcast standards, and they are all incompatible with each other. But this is nothing compared to the many technologies supporting the Internet, each with a different bandwidth and physical media. The problems faced in designing platforms and communication systems that will be accepted across the world can appear insuperable.
Even once global standards are assured, however, a further obstacle lies in wait. The Internet is plagued by long, erratic response times because it is a pull-technology, driven by patterns of user demands. Push technology, on the other hand, reverses the relationship: servers simply send information to passive users, as in television and radio. But if some form of combination between one-way television flow and interactive Internet is to be the basis of our future media, it is hard to see how it could be operated. Moreover, the problem of fusing Internet with television is also one of defining the services offered. Information, entertainment and relaxation appear at first to be quite different needs. Serious doubts remain over whether consumers will be interested in having to make the sort of mental effort associated with computing while also settling down in front of a sitcom.
Besides the issue of consumer habits, infrastructure costs are set to be immense, and will have to be met by national states or the private sector before being passed on to users. Platforms do not necessarily have to be expensive. The mobile phone is a good example of how something that is technologically sophisticated can almost be given away, with its cost recovered through service charges. Users are then coerced through clever marketing to upgrade to newer phones with more features to reinforce their dependence.
Whatever the outcome, it is obvious that technology will play an increasing part in our everyday lives. Beyond technology, digital convergence embraces the services, industrial practices and social behavior that form modern society. We have in our hands the technology to construct the most sophisticated machines ever built, but if they are unusable, simply because of their operating instructions, then recent lessons have taught us they will not survive. Whatever we design must be simple, reliable and useful. Perhaps this is where artificial intelligence will come in.

By referring to the mobile phone, the author intends to show______

A. a solution to costs involved in the technology.
B. the importance of catering to customers’ needs.
C. a trick imposed on users by telephone companies.
D. the necessity of adding more features to phones.