题目

已知2=，4=y，用含有字母的代数式表示y，则y＝__________． 答案：【答案】【解析】∵y= ，又∵=x∴y=.故答案为：.As the new term starts, freshmen around the world are asking the same question: how can I make the best of four years at college? The New York Times received suggestions recently from PhD students and seniors at some of the top universities . Here is their advice.“Many young people today are raised in a protective cocoon(茧)”, wrote Tim Novikoff, a PhD student at Comell. “College is a time to explore the world beyond and a chance to learn new things about yourself. Take classes in different subjects. Try lots of different clubs and activities.”Remember also to take some time away from campus, suggested Willie Lin, a student at Washington University. “If you spend all of your time in school, then it becomes too easy to let criticism from an unkind professor or a conflict with a roommate take up large proportions.” Try to find work assisting a researcher or a professor---this is the advice from Aman Singh Gill, a PhD student at Stony Brook University. And he also said, “With a window into the world of research, you will find yourself thinking more critically, accepting fewer states at face value and perhaps developing a brave sense of what you can accomplish.”Many young people can’t imagine even a single day without devices such as computers and cell phones. But try to keep yourself off them, cautioned Christine Smallwood, a PhD student at Columbia University.Start by scheduling a few Internet-free hours each day, with your phone turned off. It’s the only way you’ll be able to read anything serious. “This will also have the benefit of making you harder to reach, and thus more mysterious and fascinating to new friends and acquaintances(熟人),” she suggested1.The underlined sentence in Paragraph 3 means we should _________A.spend more time at schoolB.take some time out of schoolC.listen to criticism moreD.not argue with roommates2.Who thinks it is important to consider something critically?A.Aman Singh GillB.Christine SmallwoodC.Tim NovikoffD.Willlie Lin3.As for modern information devices, the last two paragraphs mean to tell us ________A.to keep ourselves off them forever not to use themB.to turn them offC.to make a schedule to use themD.not to use them4.This passage is mainly about _________A.tips from some students for college lifeB.ways to read something serious regularlyC.days without cell-phones and computersD.chances to go to university you really like