B 【解析】物质是由分子组成的，分子是有原子组成的，原子是由原子核和核外电子构成的，故A正确；半导体的导电性能处于导体和绝缘体之间，半导体具有单向导电性，故B错误；移动电话既是电磁波的发射台，也是接收台，因此是利用电磁波传递信息的，故C正确；核电站是利用可控的核裂变释放的核能发电的，故D正确.故选B.
How often do you use your car? Can you use your car less often? Do you know the following facts in the UK? ?? About 50% of all car journeys are just for fun. ?? Over 80% people go to work by car. ?? 2
I “ain’t” doing that “cos” I don’t want to! Do you understand this sentence? We speak slang words(俚语) sometimes, but it’s important to learn formal words to improve our study. This
