题目内容
When you turn on the television，put on your shoes or drive to a store，you’re using energy. Energy is one of the most fundamental forces in the world. Animals use energy to walk and run. Trees and plants use energy to grow. People use it to work and play. Energy is everywhere in nature-in the light of the sun，in the wind，in the forest,in water currents and erupting volcanoes. Without energy，there is no life. We use our own energy constantly and we continually make use of all kinds of energy. Energy can be divided into two different types：stored energy and dynamic energy. Stored energy is caned potential energy，and the latter refers to energy in motion. If you stretch out a rubber band，this produces potential energy. If you let it go，it moves and produces the dynamic energy.
查看答案
搜索结果不匹配？点我反馈
更多问题
阅读下列说明，回答问题1至问题3。【说明】 去年底某大型企业集团的财务处经过分析发现，员工手机通话量的80%是在企业内部员工之间进行的，而90%的企业内部通话者之间的距离不到1000m。如果能引入一项新技术降低或者免掉内部员工通话费，这对集团来说将能节省很大一笔费用，对集团的发展意义相当大。财务处将这个分析报告给了集团的总经理，总经理又把这个报告转给了集团信息中心主任李某，责成他拿出一个方案来实现财务处的建议。 李某找到了集团局域网的原集成商A公司，反映了集团的需求。A公司管理层开会研究后命令项目经理章某积极跟进，与李某密切联系。章某经过调研，选中了一种基于无线局域网IEEE802. 11n改进的新技术“无线通”手机通信系统，也了解到有一家山寨机厂家在生产这种新技术手机。这种手机能自动识别“无线通”、移动和联通，其中“无线通”为优先接入。经过初步试验，发现通话效果很好，因为是构建在集团现有的局域网之上，除去购买专用无线路由器和这种廉价手机之外，内部通话不用缴费。而附近其他单位听说后，也纷纷要求接入“无线通”，于是章某准备放号并准备收取这些单位适当的话费。 但等到“无线通”在集团内部推广时，发现信号覆盖有空白、噪声太大、高峰时段很难打进打出，更麻烦的是当地政府的主管部门要他们暂停并要对他们罚款。此时章某骑虎难下，欲罢不能。 【问题1】 造成这样局面的可能原因是什么章某在实施“无线通”时可能遇到的风险有哪些
根本的，激进的 a. r_ _ _ _ _ _
Passage TwoQuestions 26 to 30 are based on the following passage. Online learning is also called distance education，which helps students who take classes by computer over the Internet to learn certain courses and earn a degree. And it has become more and more popular with both young people and educational institutions. The School of Continuing and Professional Studies of New York University in Manhattan began online classes in 1992. Its Virtual School has taught more than 10,000 students from across the United States and other countries. Last year，the school launched NYU Online. It offers NYU’s first online programs for a bachelor’s degree. Programs are offered in three areas：leadership and management，information systems management and social sciences. The classes are highly interactive，where students communicate with each other and their teachers. Some classes require students to log in at the same time 80 they can attend live lectures by a professor. Students can also ask questions and work together on team projects. The cost to attend NYU Online depends on how many classes a student is to take. It costs as much as fifteen thousand dollars a year. NYU offers no financial aid for international students in this program. If you are interested in the program，you can get more details at the website：www. nyu. edu. Many other schools，too，offer online education. Students should be especially careful of programs that offer a degree in return for little or no work. These are known as diploma mills，and are illegal in the United States. Educational advisers also say that before you enter any program，make sure the work will be recognized in your country. You should also make sure the schools you are considering are officially approved. The third paragraph is mainly about the______of the programs of the School.
問3 住民は高層マンションの建設に反対している。 高層
微信支付 
支付宝支付