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Theyolkand theeggwhite aremadeofdifferentthingsandcooked atdifferenttemperatures,saidMedicalNewsToday.Theyolkhasmostofthevitamins(维他命）andisgiven tobabychicksas food.The egg white has more protein(蛋白质）and water.The tests found that changing the temperature between 100°℃ and 30°℃ can help cooka perfect egg.The next step was to try the idea with real eggs. With special tools and eight taste experts,thescientists compared the results of the new cooking method with the usual way we make hard-boiledeggs( cooked for 12 minutes） and soft boiled eggs( cooked for 6 minutes).The study showed periodic cooking made both the egg white and the yolk taste best. It wasalso the best way to help the egg keep the most nutrients(营养）,CNN said.根据材料内容选择最佳答案。31. According to the passage, what is the main reason why it's difficult to boil an egg just right?A.Theyolk cooksmuch faster than theeggwhite.B.The eggwhite and theyolk are cooked at different temperatures.C. People usually don't know the right time to boil an egg.D.The vitamins in theyolk make it hard to cook evenly(均匀地).32.What is the thirdparagraph mainly about?A.The nutrients in eggs.B.The importance of a perfect egg.C. The differences between the yolk and the egg white.otthA.The idea of “periodic cookingcametothetheywerehavingbreakfast one dayB.Other scientistsaround theworldalseggsbeforeC.TheItalian scientists first rantestsoisdifferent from“periodiccooking".34.WhichofthefollowingstepsisthectorderforItalianscientiststostudy?①Try the idea with real eggs.③Runtestsonacomputer.A.③②①④C.③①2④D.②①③④35.Which of the following is closest in meaning to the underlined word “rubbery”in the sentence“"By the tine the yolk is completely cooked ,the egg white has become rubbery”?A.When I ate the overcooked meat,it was too hard to bite.B. The fresh bread I bought this morning is very soft and smells good.C.The chocolate cake in the bakery looks so delicious that I want to buy one.D.The surface of the new table is very smooth and easy to clean.DHaveyou ever heardof Daylight SavingTime(DST)?36In spring,they move the clocksonehour forward,andin fall,theymove them onehour back.This helps people have more daylightin the evening during summer.常英语（四）第五页（共八页）崇