选择题：下列关于豆腐“毛坯”装瓶时的操作，不正确的是[ ] A．动作要迅速小心 B．加入

下列关于豆腐“毛坯”装瓶时的操作，不正确的是[ ] A．动作要迅速小心 B．加入

发布时间：2017-05-18 03:43 │ 来源：www.tikuol.com

题型：选择题

问题：

下列关于豆腐“毛坯”装瓶时的操作，不正确的是[ ]

A．动作要迅速小心

B．加入卤汤后，要用胶条将瓶口密封

C．加入卤汤后，瓶口不用密封，因为其内有盐，不会再滋生其他微生物

D．封瓶时，最好将瓶口通过酒精灯火焰

题型：选择题

“溶液”在日常生产生活中应用广泛，因而我们要掌握一些有关“物质溶解”的知识．

（1）20℃时，17gKCl溶解在50g水中恰好达到饱和，则该温度下KCl的溶解度为_______ g．

（2）相同条件下，氢氧化铜难溶于水，高锰酸钾易溶于水，说明固体物质的溶解能力和溶质的性质有关；请你举例说明固体物质的溶解能力还与什么因素有关？

（3）我们还发现，在用洗衣粉洗衣服时（在等量的水里放等量的洗衣粉），夏天洗衣粉很快溶解了，冬天反复搅拌后往往还会有许多洗衣粉颗粒悬浮水中，这说明洗衣粉的溶解度随着温度升高而_________．当你用湿手取少量洗衣粉时，感觉手烫，你认为产生这种现象的原因是_________；若取用X固体代替洗衣粉与水混合，也得到与上述相似的现象，则加入的X固体可能是下列哪种物质_________．（填下列选项前的字母）

A．氧化钙B．硝酸铵 C．氢氧化钠D．氯化钠

（4）如图为氯化铵和硫酸钠的溶解度曲线，当把相同质量的氯化铵和硫酸钠的饱和溶液从50℃降到20℃时，析出晶体最多的是_________．

（5）在40℃时取两份100g水分别往加入50克氯化铵和50克硫酸钠，充分搅拌后，升温到60℃，下列说法正确的是_________．

A．40℃时，两溶液均为饱和溶液

B．40℃时，两溶液质质量分数相等

C．50℃时．两溶液仍为饱和溶液

D．60℃时，硫酸钠溶液仍为饱和溶液，氯化铵溶液为不饱和溶液

E．60℃时，两溶液溶质质量分数相等

F．60℃时，两溶液中溶质质量分数不相等．

查看答案

完形填空。
A Love Note to My Mom When I was a little girl,I would often accompany you as you modeled for fashion photographers. It was years later that I finally understood what role modeling __1__ in your life. Little did I know you were __2__ every penny you earned to go to __3__ school. I cannot thank you enough for __4__ you told me one autumn afternoon when I was nine. After finishing my homework, I wandered into the dining room where you were buried __5__ piles of law books. I was __6__.Why were you doing what I do-memorizing textbooks and studying for __7__? When you said you were in law school, I was more puzzled. I didn't know Moms __8__ be lawyers too. You smiled and said,"In life, you can do anything you want to do." As young as I was,that statement kept ___9__ in my ears. I watched as you faced the ___10__ of completing your studies, starting companies with Dad, while still being a __11__ and a Mom of five kids. I was exhausted just watching you __12__.With your words of wisdom in my __13__ mind, I suddenly felt unlimited freedom to dream. My whole world __14__.I set out to live my life filled with ___15__,seeing endless possibilities for personal and professional achievements. Your words became my motto. I __16__ found myself in the unique position of being either the first (woman doctor in Maryland Rotary) __17__one of the few women (chief medical reporters) in my field. I gained strength every time I said, "Yes, I'll try that." Encouraged by your __18__, I have forged ahead (毅然前行) with my life's journey, less afraid to make mistakes, and __19__ meeting each challenge. You did it, and now I'm __20__ it. Sorry, got to run. So much to do, so many dreams to live.
( )1.A. found ( )2.A. saving ( )3.A. business ( )4.A. what ( )5.A. at ( )6.A. amused ( )7.A. roles ( )8.A. must ( )9.A. ringing ( )10.A. choices ( )11.A. professor ( )12.A. in danger ( )13.A. weak ( )14.A. came back ( )15.A. hope ( )16.A. constantly ( )17.A. and ( )18.A. description ( )19.A. secretly ( )20.A. doing	B. played B. making B. fashion B. that B. to B. worried B. tests B. ought to B. blowing B. chances B. doctor B. in action B. powerful B. closed down B. hardship B. shortly B. but B. statement B. curiously B. considering	C. kept C. donating C. law C. which C. upon C. puzzled C. positions C. need C. falling C. challenges C. reporter C. in trouble C. youthful C. went by C. harmony C. hardly C. or C. praise C. carelessly C. correcting	D. provided D. receiving D. medical D. where D. under D. disappointed D. shows D. could D. beating D. changes D. model D. in charge D. empty D. opened up D. sadness D. nearly D. for D. introduction D. eagerly D. reading