题干

中央电视台开播了以中外古典音乐和世界各民族音乐为主要内容的音乐频道,使观众通过它享受音乐、感悟人生。这启示我们对待丰富多彩的文化应该具有的正确态度是()
①古今中外的文化都要全部学习和借鉴 
②要珍爱自己的民族文化,弘扬中华优秀的传统文化
③要有开放的胸怀,要尊重和保护各个国家和民族的优秀文化
④任何民族的文化都属于全世界,我们应该学习外来文化的优点和长处 

A:①②③

B:①②④

C:②③④

D:①③④

上一题 下一题 0.0难度 选择题 更新时间:2017-10-13 11:19:32

答案(点此获取答案解析)

C

同类题4

根据短文内容,选择最佳答案。

    Car companies are developing vehicles that will plug into electric sockets, ust like many laptops, digital cameras, cell phones and Mp4 do. Called “plug-in vehicles”, these cars will get most of their power from electricity. Their drivers won't have to stop at gas stations as often as usual.

    The technology is more than just cool. In our car-filled world, plug-in vehicles could reduce the amount of gas we use, which keeps rising in cost now and then. Besides, driving around in these vehicles may even help the environment. Gas-burning cars produce a lot of greenhouse gas, which causes global warming.

    The first company-produced plug-in vehicles could hit the roads by 2020. But engineers still have a lot of work to do to make the technology practical and inexpensive.

    Batteries are the biggest challenge. In the plug-in-vehicle world,Li-ion(锂离子)batteries are getting the most attention. These batteries can store a large amount of energy in a small package, and they last a longer time between charges. Li-ion batteries can fit laptops, cell phones, heart instruments and other similar pocket ones.

    But because cars are so big and heavy, it would still require a suitcase-sized Li-ion batteries to power about 12km of driving. What's more, the batteries are much expensive.

    “A car filled with batteries could go a long distance,” says Ted Bohn, an electrical engineer in Chicago. “But it couldn't pull any people, and it would cost $100,000.” So researchers need to work out how to make batteries smaller and cheaper, among other questions.

    “The answers don't exist yet,” Bohn says, “As a kid, I thought someone someplace knows the answer to everything. All of these questions haven't been decided. That's what engineering is about-making a guess, running tests and getting fine results.”