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还三步一体高效训练讲评ntent of the egg.札记Walking on EggshellsCan eggs hold the weight of your entire body?Materials:six cartons(硬纸盒)of eggs,a garbage bag:年年年gee书g。。。4Directions:Place the garbage bag on the floor to make any necessary clean-up easier.Place theartons of eggs into two rows of three.Make sure all the eggs are pointing in the same direction-ther all pointy end up or all rounded end up.Step onto the first carton of eggs carefully.Make sureour foot is as flat as possible and that you are distributing your weight evenly.If you're careful,dulrenredibThec shape at the topand the bottomne egg allows the pressure to be distributed evenly over the egg.If you were to place the eggs on theirdes instead,you'd be likely to wind up with a mess.1.What is the role of white vinegar in the first experiment?A.Keeping the egg fresh.B.Dissolving the eggshell.C.Cleaning the eggshell.D.Adding flavor to the egg.2.What makes the eggs support the weight of a person?A.The weight of the eggs.B.The number of the eggs.年e+0。”。0489年89”。04C.The number of the cartons.D.The distribution of the pressure.3.What was the author's purpose in writing this text?A.To persuade readers to use eggs in new ways.B.To entertain readers with funny use of eggs.C.To tell readers some ways to experiment with eggs.D.To inspire readers to conduct experiments carefully.答案与解析】1·本文介绍了两个用鸡蛋做的实验。…L.B,根据Naked Eggs部分的Directions可知，白酷在这个失验中起到了溶解蛋壳的作用.2.D根据Walking on Eggshells部分的Directions可知，鸡蛋实际上非常结实，但是要确保所有的蛋的顶部或底部都朝上。鸡蛋顶部和底部的拱形形状可以使压力均匀地分布在鸡蛋上。如果你把鸡蛋侧放，你可能会实验失败。由此可知，鸡蛋的受力分散让这些蛋足够结实，能承受一个人的重量。3.C本文介绍了两个用鸡蛋做的实验，其目的是告诉读者，鸡蛋除了吃，还可以用来做实验以及具体的实验方法。B。44e中中0.000+4中tIn my long career of filming nature documentaries,I have encountered grizzly bears in Alaskand silverback mountain gorillas in Uganda and Rwanda.But that didn't make it any less frighteninghen I stood less than ten meters from a polar bear,perhaps the most dangerous predator (n the world.I was filming Undiscovered Worlds,along with presenter Steve Backshall.Most nights,weamped under the stars in canvas tents,wrapping ourselves in layers to keep out the bitter Arctic:hill.Aware of the risk of attack from polar bears,we took "bear watch"shifts each night.One morning,a boat driver shouted out.My first reaction was excitement:just days into ourrip to Greenland,we already had the opportunity to view one of these majestic beasts up close.Assuming that the bear would walk straight past us,we were determined to capture the scene on:ilm.I grabbed the camera and hit the record button.But that theory was quickly abandoned when the bear turned its head and,seeing our group,egan to walk towards us.Heavy on its paws,it looked fairly relaxed as it paced towards us.Myxcitement quickly turned to fear.We were absolutely in the polar bear's domain,and there wasowhere to run.【24新教材，DY,英语-R-选择性必修第四册-N】15CS扫描全能王▣婴3亿人都在用的扫描App