Ⅰ.阅读理解A

　　(2017·河南省六市联考)Imagine you are on a cold mountain with steep rocks he sun’s rays stronger.Just before you reach the snowline，you find what you came for—a small white flower，the edelweiss(火绒草)(高山的) areas.here.Plants rely on oxygen，water，and sunlight to make their own food through the process of photosynthesis(光合作用)．The alpine means less COan burn a plant’s leaves.There is little water here，so the soil is dry and rocky.You also won’t find high trees because the cold wind would blow them over!

　　Alpine plants have advantages that help them survive the bad conditions.Like all alpine plants，the edelweiss stays close to the ground to avoid the wind.The cold water is deep underground，so the edelweiss grows very deep roots.Its leaves have a thick covering，which protects the plant from the wind and the sun’s bright rays.All these special characteristics help it grow，but very slowly.

　　The edelweiss can live in the conditions，but humans can’t.Climbing in the high and cold mountains is dangerous and difficult.This is why the edelweiss became such a special flower.Long ago，a young man would pick an edelweiss flower to prove his love to a girl，although it was risky.Many men died while trying.Getting the flower proved that the man was physically strong，brave，and devoted.

　　Alpine plants can’t spread seeds，so it’s difficult for new plants to grow.Once all the edelweiss flowers are gone in an area，they will not re­grow.Governments help protect the edelweiss because it is considered an endangered plant.

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