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31.What does the underlined word"beget"mean in the last paragraph?6i0A.Cause.B.Get.C.Reach.D.Explain.为twoob2w4aDbr1oo8231imWSkin has traditionally been reserved for humans and animals until now.Forthe first time,scientists learned to grow humanlike skin on a robotic finger usingcells,a new study revealed.01"Unlike artificial skin that is commonly used when building robots,this skinis alive,"said Shoji Takeuchi,project professor at the Institute of IndustrialScience at the University of Tokyo."Living skin is the ultimate solution to giverobots the look and touch of living creatures,"Takeuchi said.The humanlike skin is made using the same building blocks as human skin.The robotic finger was first put in a liquid of collagen,which is a fibrous()protein,and human dermal fibroblasts,the two major components thatmake up human skin.After the liquid conformed()around the finger,human epidermal keratinocytes,a main type of cells that make up the outermostlayer of skin,were applied to the outside.In the trials,the flexible human skin moved freely while the finger madedifferent movements.Takeuchi's team put a collagen bandage on a part of thewounded finger to mend it,and the robot was able to move freely after theprotein repaired the skin.Collagen is a major part of human skin and has healingproperties.The skin could also repel()water,which expanded what tasksthe robot could perform."The discovery is an important one,"Takeuchi said,"but development ofthe humanlike skin still has a long way to go."Skin is a living organism,so itneeds to sustain itself by being constantly nourished while removing waste.Unfortunately,the current skin that was grown does not have that ability,so itcannot sustain itself.Takeuchi is interested in adding a vascular()system,the way blood is circulated throughout our body,to help transport nutrients toand from the cells and keep the skin alive.He also wishes to develop additionaldetails for the skin such as hair follicles,nails and sweat glands.英语试题第8页（共14页）
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