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网院兰大分析化学课程作业A

时间:2017-11-03 16:17来源:未知 作者:admin 点击:
单选题 助色团对谱带的影响是使谱带( ) A: 波长变长 B: 波长变短 C: 波长不变 D: 谱带蓝移 单选题 用纯水将下列溶液稀释10倍,其中pH变化最小的是( ) A: 1.0 mol/L NH 3 .H 2 O溶液 B: 1.0 mol/L HAc溶液 C: 1.0 mol/L HCl溶液 D: 1.0mol/L HAc + 1.0 mol/L N

.  Everyone who eats in Carman's Country Kitchen in South Philadelphia knows that if you need a job,a place to stay or a friendly ear on a blue day,you come to Carman Luntzel.The six-foot,46 year-old powerhouse not only cooks,she also acts as her restaurant's discussion leader and matchmaker.When breakfast regular Stephen Sacavitch wasn't meeting women,she put his picture on a bulletin board,with the words:"Girls.Nice guy.Give him a break."Last September a coffeepot left on a red-hot burner nearly destroyed the restaurant.Luntzel didn't have insurance.But bad news has a way of turning good at Carman's.Bereft at the thought of no more buttermilk pancakes or homemade pear pie-and no more Carman dishing out advice and help-her customers pitched in.They boarded up her windows,removed debris and primed and painted her scorched walls.It wasn't just the regulars.A guy on a motorcycle dropped off some cash.A woman from a nearby restaurant scoured charred dishes and stuck two $50 bills in Luntzel's pocket as she left.Just three weeks after the blaze,Luntzel was serving breakfast again."It was incredible,"she says."There's a sense about Carman that is just can-do,"says regular Kevin Vaughan."It's infectious." 问题: How many weeks did it take to reopen the restaurant ?
A. 2 weeks
B. 3 weeks
C. 2 months
D. 3 months
      满分:5  分
5.  The 12th lunar month in Chinese is called layue(the month to worship all the deities).The 8th day of the 12the lunar month is the Laba Festival.It is treated as the beginning of the Chinese holiday season.After the Laba Festival,people enter into the busy preparation for the Lunar New Year.The main activity of the Laba Festival is cooking and sharing the special laba gruel(laba-zhou).Most people believe it has a close relation to Sakyamuni,the Buddha.He left his comfortable home and set off in search of the final enlightenment.After days of travelling without rest,he collapsed near a river in northern India.He was revived by a wandering shepherdess,who offered him her lunch of family leftovers consisting of sticky cereal,glutinous rice,dates,chestnuts and wild fruit.After consuming this repast,Sakyamuni took a batch and sat under a tree for meditation,where he finally attained enlightenment.The very day was the 8th day of the last lunar month.The meal was the original laba gruel. 问题:Sakyamuni left his home and searched for ( )
A. weath for life
B. wisdom of life
C. comforts of life
D. remedies for life
      满分:5  分
6.  She knew she sounded old and (crabby).
A. angry
B. coarse
C. dull
D. irritable
      满分:5  分
 

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