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1、2020-2021高考英语阅读之说明文训练（二）（A） Zero-emission large passenger aircraft powered by hydrogen will be technically available in five years, according to Airbus, but they will not enter service for at least a decade as the price of the fuel needs to come down.The prediction comes from Glenn Llewellyn, vice-p
2、resident of zero-emission technology at the pan-European plane-maker. He said that while Airbus planned to demonstrate hydrogen-powered aircraft in 2025, over the next 10 years, hydrogen wont be more economic than the fossil fuel equivalent. “To make real emissions free hydrogen-powered planes, whic
3、h give out only water and heat, their fuel needs to come from hydrogen produced via renewable sources such as wind and solar,” he added. Another barrier is building up the ecosystem that hydrogen aircraft will need”.However, Mr Llewellyn predicted that there was enough interest in the sector to make
4、 this happen. In an interview, Mr Llewellyn said, “We already see massive increases in the amount of renewable energy being produced across the world. Wind energy production has multiplied by two over the last five years and solar energy production has multiplied by four.” He added, “There are a num
5、ber of independent institutes that have mapped out how hydrogen costs can come down over the next decades. We see a 30% reduction in renewable hydrogen costs in 2030 compared to where it is today, and a 50% reduction in renewable hydrogen costs by 2050. They are exactly the kind of cost figures that
6、 are interesting for us, because it makes zeroemission aircraft commercially viable （可行的）in the 2030s.”Last month UK-based Zero A via conducted the worlds first flight of a commercial - grade aircraft powered by hydrogen. A few days before, Airbus announced a series of design proposals for hydrogen-
7、driven aircraft, including a “blended wing” concept that provides greater storage capacity. This design could be key to hydrogen-powered aircraft as the fuel is less energy dense （密度大）than conventional fuel and so requires more space to match performance of existing airplanes.1Which can be the suita
8、ble title for the text?AA prediction about Zero-emission aircraft.BZero-emission large aircraft will be available.CHow Zero-emission large aircraft will be made.DThe barriers to make Zero-emission large aircraft.2What does Paragraph 2 focus on?AThe future to make hydrogen-powered aircraft.BThe impor
9、tance to make hydrogen-powered aircraft.CThe problems to make hydrogen-powered aircraft.DThe possibility to make hydrogen-powered aircraft.3What does the underlined word “capacity in the last paragraph mean?ASpace.BAbility.CPlace.DCapability.4What is Mr Llewellyns attitude towards the future of Zero
10、-emission large aircraft?ACautious.BNegative.CDoubtful.DPositive.（B） “The pile of ice is so thick; it extends more than 10, 000 feet above the ocean. And if all that ice were to melt and go into the ocean, global sea levels would rise by about 24 feet everywhere around the world,” said Jason Briner,
11、 a geologist who studies the ice sheet in Greenland at the University of Buffalo. The ice sheet of the biggest island in the world is melting, and the ice sheet that sits atop it is massive. The ice sheet is melting, of course. But just how much, compared to the past?Briners team did a computer simu
12、lation (模拟) of the southwest part of the Greenland ice sheet which he says is a good indicator for ice melting across the entire ice sheet. The researchers plugged past climate data into that model to “hindcast,” rather than forecast, the past activity of the ice sheet. They then checked the models
13、predictions of the past shape and size of the ice sheet by looking at piles of rocks and dirt on Greenland today, which outline the edges of ancient ice. And the simulation was in good agreement with the actual situation.Using that reconstruction of the ice sheet over time, the team could compare th
14、e ice sheets historic losses to those happening today under human-caused global warming. And they determined that Greenland is on track to lose more ice this century than during any century in the past 12,000 years possibly four times as much.Finally, its up to us how much ice actually melts. If the
15、 world goes net carbon zero by 2100, for example, Briner says ice loss could stop entirely at the end of the century, according to one model. “That was what kept me from being completely depressed about our study.” Dozens of countries have already announced goals to go net zero by the middle of this
16、 century so far the U. S. is not one of them.1What do we know about the Greenland ice sheet?AIt is as thick as over 10,000 feet.BIt is becoming smaller and smaller.CIt has raised sea levels by 24 feet.DIt is the largest ice sheet in the world.2How did Briners team conduct their research?ABy modeling part of the ice sheet on computer.BBy doing a simulation of the whole ice sheet.CB
