全国100所名校最新高考冲刺卷英语2023届Y1

2023-11-05 08:46:33 3℃

全国100所名校最新高考冲刺卷英语2023届Y1正在持续更新，目前2026届海淀八模答案网为大家整理了相关试题及答案，供大家查缺补漏，高效提升成绩。

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tsThe high Andes of Peru are a hummingbird's paradise.There are few predators)And wildflowers cover the mountain slopes.Their blooms are full of the sugarynectar (these birds need for energy.But there's one problem.At night,tempera-tures drop below freezing.Now scientists have uncovered the way these birds use tomake it through those cold nights:They chill out.As the sun goes down and it gets cold,these hummingbirds land for the night.Then they stay inactive.They no longer move.Their heart rate slows way down.Andtheir body temperature dives.The black metaltail (Metallura phoebe),a species ofhummingbird,chills to 3.26Celsius (37.8Fahrenheit),the new study shows.That's密the coldest body temperature ever recorded in a bird or non-hibernating mammal.They're cold as a rock.If you didn't know better you'd think they were dead,"saysBlair Wolf,who studies how such animals'bodies adapt to their environment.Keeping warm at night takes energy.Endothermic (animals,mammalsand birds fuel their body heat with food.This lets them stay active when it's cooler out-side.But some of that heat gets lost through the skin.And small creatures lose a biggershare of that heat.Their small bodies also mean they can't generate heat as quickly asbigger animals.Being super-small,hummingbirds may weigh only about six grams.To fuel their封flights,a hummingbird needs nectar from 500 flowers a day.So they don't waste energyon trying to stay warm all night.Cooling to near-death temperatures lets them save precious energy.Around sunrise,hummingbirds start picking up again.By shaking,the birds warmabout one degree a minute."You see the bird vibrating there,then all of a sudden itseyes pop open and it's ready to go,says Wolf.28.What makes Andes of Peru a paradise for hummingbirds?A.High altitude.线B.Pleasant climate.C.Rich food and few enemies.D.Untouched mountain slopes.29.What can be known about hummingbirds?A.They are hibernating creatures.B.They can't produce heat at night.C.They hardly keep warm at night because of their small size.D.They lack the ability to adapt to diverse conditions.高三月考卷·英语（七）第6页（共12页）

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