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1.What can be the best title of this text?A.Airbag Jeans for MotorcyclistsB.Safety Rules for MotorcyclistsC.Risks that Motorcyclists FaceD.Innovation in the Clothing IndustryDWhen a tiny glass frog sleeps,its body becomes so transparent that it can be nearlyinvisible.Even the red blood disappears.It's an unusual trick-most see-through animals live inwater all the time,which don't produce red blood cells ()But when the frogs are active,blood begins to flow,and the bright red blood can be seenagain.So,scientists set out to discover what happens to all that blood.In a new study,researchers found out how,while sleeping,a glass frog sends most of the redblood cells to its liver (In the process,the liver grows in size by about 40%to accommodatethe extra cells.Like some other organs,such as its heart,the frog's liver is covered in a mirroredpart,which reflects lights,that helps the frog hide itself from enemies.“If these frogs are awake,stressed or under anesthesia(庥醉),their blood systems are full ofred blood cells,and they are not transparent,"explains an expert.The only way to studytransparency is when these animals are happily asleep,which is difficult to achieve in a researchlaboratory.”Luckily,there is an imaging technology which can check red blood cells without breaking theskin of frogs.The team used this technique on frogs while they were sleeping.They found theanimals moved a shocking 89%of their red blood cells to their livers while sleeping.How exactly these frogs can send most of the red blood cells to its liver without getting bloodclots (remains a mystery.Most other animals'blood becomes very thick if the cells becomeconcentrated,which can help cure a wound or-in a worse situation-stop blood from flowing toimportant areas.Understanding more about how the frogs stay healthy while jam-packing (their livers with red blood cells could help promote blood clot research in humans.32.Why are the glass frogs unusual?A.They are very tiny.B.They live in the water all the time.C.They almost cannot be seen.D.They don't produce red blood cells.33 What happens to its liver when a glass frog is sleeping?A.It absorbs lights.B.It produces blood clots.C.It works like a heart.D.It becomes larger in size.34.What troubled the researchers when they studied transparency of glass frogs?A.To stop blood from flowing.B.To put the frogs to a proper state for study.C.To check the red blood cells.D.To measure the frogs'movement.高二英语第6页共10页
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