(
课件网) 背相关短语 get (sth.) across (to sb.) 使(某事)被(某人)理解 get along with sb. 与某人相处；进展 get away with sth. 携某物潜逃； 不因某事受惩罚 get down to (doing) sth. 开始做某事；认真处理某事 get over 熬过；克服(困难)；从……中恢复过来 背写作佳句 ①A smile can help us get through difficult situation and find friends in a world of strangers. 一个微笑可以帮助我们度过困境，并在陌生人的世界里找到朋友。 ②(2019·全国卷Ⅰ书面表达)As an out-going boy, I get along well with almost everyone around. 作为一个外向的男孩，我几乎与我身边的每个人都相处得很好。 学案(三) 高考语篇的价值发掘———提升学科素养 2020·天津5月高考·阅读理解C篇———对接课标主题：科技发展与信息技术创新，科学精神，信息安全 Transport has a lot to answer for when it comes to harming the planet. While cars and trains are moving towards greener, electric power, emissions from air travel are expected to increase massively by 2050. If we want big green sky solutions, we need blue sky thinking. Fortunately, there's plenty of that happening right now, particularly the short-haul flights powered by batteries. Harbour Air is the largest seaplane airline in North America, flying 30,000 commercial flights in 40 seaplanes each year. Significantly, all Harbour Air routes last less than 30 minutes, making it perfectly fit for electric engines. “As an airline, we're currently in the process of turning all our planes into electric airplanes，” says CEO Greg McDougall. To make this happen, the airline has partnered up with MagniX to create the world's first commercial flight with an electric engine. Making the skies electric isn't just good for the environment; it also makes sound financial sense: a small aircraft uses $400 on conventional fuel for a 100-mile flight, while an electric one costs $8－12 for the same distance, and that's before you factor in the higher maintenance costs of a traditional engine. There's also the added bonus that electric planes are just much more pleasant to fly in. No loud engine noise, no smell of fuel, just environmentally friendly peace and quiet. While there has been real progress in the e-plane industry, the technical challenges that remain are keeping everyone's feet firmly on the ground. A battery, even a lithium one, only provides 250 watt-hours per kilogram; compare this to liquid fuel, which has a specific energy of 11,890 watt-hours per kilogram. Carrying adequate batteries, however, would make the plane too heavy to get off the ground. In aircraft, where every bit of weight counts, this can't just be ignored. The transition (过渡) from gas to electric in the automobile industry has been made easier by hybrids — vehicles powered by both fuel and electricity. Many believe the same pattern could be followed in the air. Fuel consumption could be reduced as the electric component is switched on at key parts of the journey, especially on take-off and landing. It's certainly an exciting time fo ... ...
