题干

有三瓶无标签的无色溶液,只知道它们分别是稀盐酸,BaCl2溶液和Na2CO3溶液中的各一种。下列四种试液中,不能将三种无色溶液一次鉴别开来的是(   )

A:Na2CO3溶液

B:稀硫酸

C:石蕊试液

D:AgNO3溶液

上一题 下一题 0.0难度 选择题 更新时间:2011-04-26 04:55:24

答案(点此获取答案解析)

D

同类题1

What do you like most when you can get one of such things: freedom, true friends, love, honesty and so on? Here are some choices of students:
Chen Cheng, 14, Jiangsu: I think I need a true friend. I had some friends before. However, it seemed that they didn’t treat(对待) me well. I told them my secrets but they didn’t share(分享) theirs with me. What’s worse, they told my secrets to others, which made me very unhappy. I hope to find a true lifelong(终身的) friend who can share happiness and sadness with me and keep my secrets.
Gan Xiaoning 14, Heilongjiang: Freedom is what I want most. I am a bird in two cages(笼子). In school, I have to follow the school’s rules and listen to teachers. At home, my parents don’t allow me to do what I like, either. I have to do everything that they tell me to do: study, study and study some more. So, freedom is the only thing I really want!
Yuan Siyu, 15, Guangxi: I am a boy from a poor family. My father works very hard but only makes a little money every month to support(支撑) the family. I want to go to a key university (重点大学)so that I can find a good job in the future. Then, I can earn enough money to get my family out of poverty(贫困) and offer my parents a happy life.
Qu Yi, 15, Hebei: I want a complete family. My parents got divorced(离婚) three years ago. Since then, I have had no chance to be together with both of them any more. Now, I am living with my mom and get her love, but I also want my dad’s love. I am envious(羡慕) of my classmates who live with their parents. So, I would have a complete family if I could.



同类题2

阅读下面的古诗文,完成小题。

豫让传

    豫让者,晋人也,故尝事范氏及中行氏①,而无所知名。去而事智伯,智伯甚尊宠之。及智伯伐赵襄子,赵襄子与韩、魏合谋灭智伯,灭智伯之後而三分其地。赵襄子最怨智伯,漆其头以为饮器。豫让遁逃山中,曰:“嗟乎!士为知己者死,女为说己者容。今智伯知我,我必为报雠②而死,以报智伯,则吾魂魄不愧矣。”乃变名姓为刑人,入宫涂厕,中挟匕首,欲以刺襄子。襄子如厕,心动,执问涂厕之刑人,则豫让,内持刀兵,曰:“欲为智伯报仇!”左右欲诛之。襄子曰:“彼义人也,吾谨避之耳。且智伯亡无後,而其臣欲为报仇,此天下之贤人也。”卒释去之。

    居顷之,豫让又漆身为厉,吞炭为哑,使形状不可知,行乞於市。其妻不识也。行见其友,其友识之,曰:“汝非豫让邪?”曰:“我是也。”其友为泣曰:“以子之才,委质而臣事襄子,襄子必近幸子。近幸子,乃为所欲,顾不易邪?何乃残身苦形,欲以求报襄子,不亦难乎!”豫让曰:“既已委质臣事人,而求杀之,是怀二心以事其君也。且吾所为者极难耳!然所以为此者,将以愧天下後世之为人臣怀二心以事其君者也。”

    既去,顷之,襄子当出,豫让伏於所当过之桥下。襄子至桥,马惊,襄子曰:“此必是豫让也。”使人问之,果豫让也。於是襄子乃数豫让曰:“子不尝事范、中行氏乎?智伯尽灭之,而子不为报雠,而反委质臣於智伯。智伯亦已死矣,而子独何以为之报雠之深也?”豫让曰:“臣事范中行氏范中行氏皆众人遇我我故众人报之至於智伯国士遇我我故国士报之。”襄子喟然叹息而泣曰:“嗟乎豫子!子之为智伯,名既成矣,而寡人赦子,亦已足矣。子其自为计,寡人不复释子!”使兵围之。豫让曰:“臣闻明主不掩人之美,而忠臣有死名之义。前君已宽赦臣,天下莫不称君之贤。今日之事,臣固伏诛,然原请君之衣而击之,焉以致报雠之意,则虽死不恨。非所敢望也,敢布腹心!”於是襄子大义之,乃使使持衣与豫让。豫让拔剑三跃而击之,曰:“吾可以下报智伯矣!”遂伏剑自杀。死之日,赵国志士闻之,皆为涕泣。

(选自《史记·刺客列传》)

【注】①范氏、中行氏:春秋时晋国大夫,与智伯、赵、韩、魏合称“晋国六卿”。②报雠:亦作“报仇”。