学进去-教育应平等而普惠
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类型:阅读选择
难度系数:0.40
所属科目:高中英语

This year, people around the world are lining up to buy electric vehicles even as prices increase. Electric vehicle, EV, demand has stayed strong even as the average cost of lithiumion (锂离子) battery cells increased to an estimated $160 per kilowatt-hour in the first quarter from $105 last year. Costs rose due to supply issues, restrictions on Russian metals and investor speculation (投机).

For a smaller vehicle like the Hongguang Mini, the best-selling EV in China, the higher battery costs added almost $1,500, equal to 30 percent of the listed price. But gasoline and diesel fuel costs have also increased since the conflict between Russia and Ukraine, and experts noted that environmental concerns are also pushing more buyers to choose EVs.

Manufacturers from Tesla to SAIC-GM-Wuling, which makes the Hongguang Mini, have passed higher costs on to consumers with price increases for EVs. More may be coming. Andy Palmer, chairman of Slovak EV battery maker InoBat, said, “rising costs will have to be passed onto carmakers.” But EV shoppers have so far not slowed down. Worldwide EV sales in the first quarter jumped nearly 120 percent, said the website EV-volumes.com.

Venkat Srinivasan is director of the Center for Collaborative Energy Storage Science at the U.S. government’s Argonne National Laboratory in Chicago. He said, “more and more people would buy EVs despite the cost of the battery and the vehicle.”

This increase in battery costs could be an unusual short-term change in a situation in which improving technology and growing production have pushed costs down for almost 30 years. Industry data showed that the $105 per kilowatt hour average cost in 2021 was down nearly 99 percent from over $7,500 in 1991.

Experts say battery costs could stay high for the next year or so, but then another large drop is likely as big investments by automakers and suppliers change the balance from shortage to surplus. “It’s like a bubble (泡沫) and for that bubble to settle down, it’s going to be at least the end of 2023,” said Prabhakar Patil, a former LG Chem executive.

The industry has long been awaiting the battery cell cost of $100 per kilowatt-hour, as a signal EVs were reaching a similar cost to fossil-fuel vehicles. But with gasoline prices high and consumer preferences changing, such cost considerations may no longer matter as much, experts say.

1.Why does the author mention Hongguang Mini?
A.To present a fact.B.To give an example.C.To introduce a topic.D.To make an assumption.
2.What will possibly lead to the drop in battery costs in the future?
A.More EV shops.B.Production growth.C.Sufficient supplies.D.Technology improvement.
3.What does the author think of the prospect of EVs?
A.Promising.B.Unclear.C.Doubtful.D.Confusing.
4.What can be inferred from the text?
A.At present demands for EVs beat supply.B.People concern price more when buying cars.
C.EVs sell much better than fossil-fuel vehicles.D.People prefer EV mainly because of conflict.
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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