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理工科的博士研究生必须要在专业刊物上发表过论文,而且必须是核心期刊。()
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U2Additional Language QuizThere are ten sentences in this section. Beneath each sentence there are four choices or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentences.1. An unexpected strength of the book is the chance it affords Jeffrey Mason, one of the original detectives who doubted Marie, to ______his mistakes.A. date back B. date to C. look back onD. look onto2. It reminded me of George Clooney's role in Up in the Air, __________ homeless and alone.A. primarily B. ultimatelyC. essentially D. basically3. They sacrificed their future to save the life of their son. It does fill me with a lot of __________ and shame.A. guiltB. debt C. thank D. innocence4. The term parade is __________ the Latin word parare, to prepare—in a military context—for war.A. incorporate of B. part of C. acquired from D. derived from5. My Facebook feed was full of moans and groans related to — you guessed it — __________ weather.A. miserableB. delightful C. attractive D. meaningless6. Jimmy Kimmel ________ Trump’s claim to being a “genius”, noting a website that used software to show Trump speaks at a fourth-grade reading level.A. opened up B. held onto C. poked fun atD. kept up with7. Only before the show starts __________ enter the music hall.A. can youB. you can C. should you D. you should8. It’s time __________ ready for work.A. getting B. to getC. get D. got9. Costa Rica suffers a __________ circlein which the voters seek new political actors who fare as badly as the old ones.A. virtuous B. viciousC. positive D. negative10. Women are __________ the equality in workplace.A. striving against B. striking against C. striking for D. striving for
1. "I don't like being in the house on my own.""______ at night? Do you mind being by yourself at night?"A. What aboutB. What withC. What ifD. So what2. He came back late, _______ which time all the guests had already left.A. afterB. atC. byD. during3. ______ money from his department, Mr. Williams would have been promoted to the position as director.A. If he did not stealB. Had he not stolenC. Did he not stealD. Should he not steal4. _______ it was on the side of a mountain, the village was very quiet.A. Isolated asB. Isolating ifC. Being isolated asD. Having been isolated if5. I hope all the measures against air pollution, _______ suggested by the local government, will be seriously considered here.A. whileB. sinceC. thatD. as6. Students of _______ grades are those studying in the first three grades of elementary school.A. entryB. basicC. mainD. primary7. The museum is _______ a valuable group of coins.A. displayingB. exhibitingC. presentingD. giving8. Many cookbooks have very ______ directions.A. commonB. confirmedC. complicatedD. compound9. The ______ for speeding is a fine of one hundred and fifty dollars.A. penaltyB. benefitC. criticismD. remedy10. The two brothers are very much _____, not only in appearance but also in thinking.A. likeB. likelyC. alikeD. alive11. The Great Wall winds its way ________ the mountains.A. throughB. acrossC. pastD. behind12. These areas rely on agriculture almost ___________, having few mineral resources and a minimum of industrial development.A. respectivelyB. relativelyC. incrediblyD. exclusively13. A ______ slowing in reaction time will occur if a senior doesn't stay active.A. uniqueB. obviousC. beautifulD. striking14. The survival _____________ of some wild animals is not very high as they are often killed for their skins.A. rateB. degreeC. ratioD. scale15. From this material we can __________ hundreds of useful products.A. deriveB. reduceC. employD. replace16. The judge considers a financial ____________ to be an appropriate way of punishing him.A. optionB. dutyC. responsibilityD. penalty17. His grandfather is still ________ and lively, full of energy.A. vigorousB. violentC. intenseD. high-impact18. We are all for your proposal that the discussion ________.A. was put offB. is to put offC. be put offD. should put off19. Frequently single-parent children _______ some of the housework.A. take offB. take afterC. take onD. take in20. He'll be angry if you try to ______ him. He is very busy now.A. interfere withB. interfere inC. disturb withD. worry about
（判断题）在回归分析中，可用残差图判断模型的拟合效果，残差点比较均匀地落在水平的带状区域中，说明这样的模型比较合适．带状区域的宽度越窄，说明模型的拟合精度越高。
（单选题）在一元线性回归方程y＝a＋bX中，回归系数 表示（）。
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