问题 选择题

只用一种试剂就能将NaOH、NaCl、BaCl2三种溶液鉴别出来,它是( )

A.Na2SO4溶液

B.酚酞试液

C.CuSO4溶液

D.Fe(NO3)3溶液

答案

答案:C

A、虽然硫酸钠能与氯化钡生成硫酸钡白色沉淀,但因不能与氢氧化钠、氯化钠反应而无明显现象,所以使用硫酸钠溶液不能将NaOH、NaCl、BaCl2三种溶液鉴别出来;故A不可选;

B、虽然酚酞试液遇氢氧化钠溶液能变红色,但与氯化钠、氯化钡溶液混合时无明显现象,所以使用酚酞试液不能将NaOH、NaCl、BaCl2三种溶液鉴别出来;故也不选B;

C、硫酸铜与氢氧化钠可生成蓝色氢氧化铜沉淀、与氯化钠不反应而无明显现象、与氯化钡可生成白色硫酸钡沉淀,因此使用硫酸铜溶液能将NaOH、NaCl、BaCl2三种溶液鉴别出来;故C可选;

D、硝酸铁溶液只能与氢氧化钠溶液混合出现红色氢氧化铁沉淀,而与另两种溶液不反应而无明显现象,所以使用硝酸铁溶液不能将NaOH、NaCl、BaCl2三种溶液鉴别出来;故D也不选.

故选C.

阅读理解

Do you get angry at your friends’ singing loudly while you are working? Or when your best friend does not wait for you after school?

If you do, you need to control your feelings and stop getting angry so easily. Getting angry with people can make you lose friends.

Gary Egeberg, an American high school teacher, has written My feelings Are Just Like Wild Animals to help you control your feelings. It tells teens how to stay cool when bad things happen to them. The book says that getting angry only makes problems worse. It can never make them better. Getting angry is not a natural way to act. It is just a bad habit, like smoking. The book says you can control your anger easily—all you have to do is telling yourself not to be angry.

When a baby falls over, it only cries if people are watching it. Like a baby, you should only get angry if you are sure it is the right thing to do.

·Keep a record. Every time you get angry, write down why you are angry. Look at it later and you will see you get angry too easily.

·Ask your friends to stop talking to you when you get angry. This will teach you not to be angry.

·Do something different. When you get angry, walk away from the problem and go somewhere else. Try to laugh!

小题1:The writer wants to tell us         .

A.not to get angry

B.to work hard at school

C.to do more exercise

D.to help each other小题2:The writer thinks that if you get angry easily you will         .

A.get ill very easily

B.lose your friends

C.get sad easily

D.eat less小题3:My Feelings Are Just Like Wild Animals is a         .

A.story

B.book

C.picture

D.film小题4:My Feelings Are Just Like Wild Animals mainly tells us         .

A.what to read

B.how to read

C.how to stay cool

D.how to learn English小题5:When a baby falls over, it only cries if people are watching. Here “it” refers to         .

A.the book

B.anger

C.habit

D.the baby

单项选择题

阅读下列短文,回答第36~40题:古人比较重视步行,无论是走路的速度,还是步行、体态都有较为明确的划定和区别。步行须遵制合礼是古代礼法的一个重要内容。古代以右、前为尊。道路之上,男居右行,女居左行;与父辈外出,小辈随后相从,不得逾前;与兄弟朋友外出,须并行,有如雁阵,不得超速领先。否则为越位,越位即越礼,要受到非议。在古人看来,走路的速度、方式须在不同的场合有所区别。《尔雅》说:“堂上谓之行,堂下谓之步,门外谓之趋,中庭谓之走,大路谓之奔。”东汉人解释,两脚进曰“行”,徐行曰“步”,疾行曰“趋”,疾趋曰“走”,“奔”即后人所说的奔跑,如果不遵此行走,无疑既不合礼,又不合理。汉代还明文规定在帝王面前要“疾趋”。对朝廷有特殊贡献的人或皇上特别亲近的人,可以免去此礼,当然那是独沐皇恩、荣耀无比的事了。在官场之中,则有“趋礼”之说。对趋礼的要求也非常严格。如若行走迟缓则要遭到斥责,甚至有降职免官的危险。县令拜谒知府若行步迟缓,知府的守门人便可斥责县令。在丰富多彩的社会生活中,在不背道逾礼的情况下,古人也十分讲究步行美,以此体现人的性格情趣和风度的教养。先秦君子步行鸣佩玉,既喻示着君子言行举止要符合德行的要求,而佩玉之声伴随着步行的节奏,又显示出一种庄重和谐的美。对待步行,儒道两家态度素不相同。儒家容美于善,道家容美于真。因此,庄子曾尖刻地批评了学行于邯郸的寿陵余子和亦步亦趋效仿孔子走路的颜回,借此嘲讽了儒士们拘守礼义、失去故我的荒唐。但同时,寿陵余子和颜回的行为又从侧面反映了一种“时尚”。寿陵余子认为首都邯郸人的步法独特优美,有节有度,有仪有威,是有许多可学之处的。颜回步、趋、走、奔处处要学孔子,除了他遵守纪律外,起码在他的眼里,这些是非学到手不可的特技,是他人无法企及的极美的东西。汉末至魏晋时代,随着儒学的日益衰落和人们思想的逐渐解放,人们对美的崇尚与追求更为显著,因此节度迟缓不迫、举止舒泰优雅的步行,作为衡量一个人的修养、气质和风度的重要标准,常为品评者称誉。乐府民歌《陌上桑》载秦罗敷在拒绝使君求婚时,就夸说自己的丈夫:“盈盈公府步,冉冉府中趋。”古人还把与步行有关的词语用来表情达意。如常见的徘徊、彷徨、踟蹰等,就被演化为举步不定、犹豫不决的意思。“徒跣”一词,原义是脱掉鞋子赤脚走路,后演化为表示发怒、着急、匆忙和痛苦的情感。徒跣又如倒屣,碰到身份特殊的人或情状特殊的事,需急遽迎接或前往以示重视时常用此词。刘邦赦免了萧何,萧何“徒跣入谢”,即是表示急速前往致谢的意思。步行这个简单的行为所蕴含的文化内涵丰富多彩,我们从中可以看到某些历史文化现象,这对我们是不无裨益的。

综观全文的内容,以下推断合乎作者观点态度的一项是()。

A.作者对古人步行要受礼法的严格限制颇不以为然

B.作者写作本文主要是为了介绍一些历史文化现象

C. 汉末之后人们对步行美的崇尚象征着儒学的衰亡

D.写儒道两家对步行的不同态度表明作者尊道贬儒