1.不能。因为“唯一的”即“独一无二”,准确地说明了要改变这种困难,除找到既环保又可再生的替代性能源外,别无他法。
2.因为氢燃烧后产生的是水,而这种水对自然界完全无污染,所以氢动力汽车可以实现“零污染”。
3.①科技的发展和巨大市场利润的刺激;②石油面临枯竭的威胁,汽车终有一天会无油可有;③氢既环保又可再生;④氢无处不在
4.中心句是:氢能源的开发技术是氢动力汽车最终走进寻常百姓家的关键。
The Role of Mobile Phone in People's Communication
The popularity of smartphones has exerted great influence on the way people communicate, so much so that an increasing number of individuals contend that face-to-face communication is being replaced by texts and images on the mobile phone.
There are more than one angle to consider this phenomenon. On one hand, it is pleasantly acknowledged that smartphones shorten the distance between families and friends. Even people from different sides of the globe can share pictures, feelings and thoughts through various types of apps on the phone, thus building a long-distance connection. On the other hand, as the picture warns us, too much smartphone addiction interferes with people's real-life communication. Statistics show that over 70 percent of face-to-face communication consists of facial expressions and body language, which is why people should stay away from mobile phones when they have the chance to actually talk and communicate with others.
In a word, mobile phones act as an appropriate platform where people can always stay in tough however long the distance is, but a wise man should know when to put down his phone.
老师,您那眼角的皱纹,有一条是为我而生;您那头上的银发,有一丝为我而白。,。“这诗句不是赞颂您燃烧自己,照亮别人的奉献精神的真实写照吗?
花开了,就像花睡醒似的;虫子叫了,就像 ; ; 。
(1(夹竹桃不是最美丽的,(夹竹桃最值得我留恋回忆。(填关联词
(2一个国家,一个城市,能够举办上奥运会,是一件美好的事。(改成反问句
(3根据”琢磨“的不同意思造句。
①表示”雕刻和打磨“:
②表示”思索、考虑“:
(4从下面两组词语中任意选择一组,写一句话。
A、非……不可……举世闻名B、即使……也……古今中外
专心致志 无缘无故 震耳欲聋 张灯结彩 恍然大悟 闻所未闻
造句:(1:
造句:(2:
造句:(3:
1.人造光对动植物和人类造成危害的现象。(2分
2.①“吸引”并“***死”昆虫;②使动物迷失方向;③使动物无端消耗精力。(3分
3.因为只有长期在光污染严重的条件下工作或生活,才会出现严重的症状。
4.使用色彩柔和而自然的纸张,可有效降低光反射系数,减轻光污染引起的视觉疲劳,保护视力。
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