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Which of the following is the main idea of the passage? A. Evolution has equipped all creatures with a regular pattern of sleeping and walking B. The study of the sleep is an important part of the evolutionary theory C. Sleeping pattern must be taken into consideration in the designing of the robot D. The sleeping pattern of a living creature is determined by the food it eats C Ask any person who is successful in whatever he or she is doing what motivates him/her, and very likely the answer will be "goals". Goal Setting is extremely important to motivation and success. So what motivates you? Why are you in college? If you are in college because that's what your parents want, you may find it difficult to motivate yourself. Sure, it's possible to succeed with someone else providing the motivation for you. ("If you graduate from college, I'll give you a car!" or worse "If you don't graduate from college, you won't get a car.") But motivation that comes from within really makes the difference. Certainly, you need some intelligence, knowledge base, study skills, and time management skills, but if you don't have motivation, you won't get far. Think about this analogy. You have a car with a full tank of gas, a well-tuned engine, good set of tires, quadraphonic CD system, and a sleek, polished exterior. There it sits. This car has incredible potential. However, until a driver sits behind the wheel, puts the key in the ignition, and cranks it up, the car doesn't function. You guessed it; the KEY is MOTIVATION. Interest is an important motivator for a student. So is a desire to learn. When you link these two things together, you create success. Often success in an endeavor leads to more interest and a greater desire to learn, creating an upward spiral of motivation toward a goal you have established. So be honest with yourself. Are you genuinely interested in being in college? Have you set realistic goals for yourself? How can you develop the internal motivation that really counts? When it comes to motivation, KNOWING is not as important as DOING. 【查看更多】

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1898年，IUPAC（International Union of Pure and Applied Chemistry，國際純粹與應用化學聯合會）建議用1～18列代替原周期表中主族、副族序號，請問原第IVA族應該在第幾列？（　　）

A、第4列

B、第14列

C、第5列

D、第15列

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中國科技大學的研究人員于2010年9月14日宣布，驗證了通過電化學催化重整方法，可從生物油有效地生產氫氣．這一工作成果已發布在《中國化學物理雜志（Chinese Journal of Chemical Physics）》上．下列有關電化學的示意圖中正確的是（　　）

A．