下列装置或操作能达到实验目的是（ ） A．排水集气法收集NO B．用滴瓶长期保存 发布时间：2017-07-14 03:18 │ 来源：www.tikuol.com 题型：选择题 问题： 下列装置或操作能达到实验目的是（ ）A．排水集气法收集NOB．用滴瓶长期保存NaOH溶液C．实验室制取乙酸乙酯D．石油的分馏
题型：选择题 完形填空。 What is happiness to you? Are you happy? Do you remember a time when you were happy? Are you seeking happiness today? Many people have 1 a variety of sources for their happiness. Some have put their heart and effortinto their work. Too many have turned to drugs and alcohol. Untold numbers have turned to expensive cars, exotic vacations, and other popular "toys". Most of their efforts have one point in 2 : people are looking for a 3 of happiness. Unfortunately, I believe that happiness escapes many people because they 4 the process and journey of finding it. I have heard many people say that, "I'll be happy when I get a higher position." Or "I'll be happywhen I lose that 5 20 pounds." The list goes on and on. You probably have a few of your own you could 6 to it if you wanted. But this thinking is 7 because it presupposes (预先假定) that happiness is a "response" to having, being or doing something. In life, we all 8 stimulus (刺激) and response. Stimulus is when a dog barks at you. Response is when your heart beats faster and you 9 to run. Today, some people think that an expensive car is a stimulus. Happiness is a response. A great paying job is a stimulus. Happiness is a response. A loving relationship is a stimulus. Happiness is a response. This belief 10 us thinking and feeling:"I'll be happy when…" It has been my finding that actually the 11 is true. I believe that happiness is a stimulus and response is what life brings to those 12 are truly happy. When we are happy, we 13 have more success in our work.When we are happy, people want to be around us and enjoy loving relationships. When we are happy, we morenaturally take better care of our 14 and enjoy good health. Happiness is NOT a response - 15 , it is astimulus. Happiness is a choice we 16 every day of our lives. For unknown reasons to me, many choose to be painful, unsuccessful and angry most of the time. Actually, happiness is 17 something that happens to us after we get something we want-we usually can get things we want 18 we choose to be happy. I have made only one 19 rule for my own happiness: Every day above ground is a GOOD day. 20 , I tend to have a lot of good and happy days continually. ( )1. A. sent ( )2. A. ordinary ( )3. A. source ( ) 4. A. enjoy ( )5. A. valuable ( )6. A. add ( )7. A. interesting ( )8. A. refuse ( )9. A. mind ( )10. A. stops ( )11. A. similar ( )12. A. which ( )13. A. probably ( )14. A. newspapers ( )15. A. instead ( )16. A. set ( )17. A. just ( )18. A. as if ( )19. A. simple ( )20. A. However B. bought B. common B. set B. get B. priceless B. make B. dangerous B. donate B. stop B. forbids B. ordinary B. who B. seldom B. magazines B. so B. read B. not B. after B. hard B. Instead C. lent C. normal C. group C. ignore C. worthy C. accept C. lovely C. borrow C. prepare C. leaves C. same C. when C. never C. bodies C. thus C. make C. nearly C. though C. difficult C. Unluckily D. sought D. usual D. pile D. have D. extra D. consider D. nice D. experience D. enjoy D. prevents D. opposite D. where D. impossibly D. books D. also D. put D. almost D. before D. complicated D. Therefore 查看答案
排水集气法收集NO
用滴瓶长期保存NaOH溶液
实验室制取乙酸乙酯
石油的分馏排水集气法收集NO用滴瓶长期保存NaOH溶液实验室制取乙酸乙酯石油的分馏