实验室常用的几种气体发生装置如图A、B、C所示: (1)实验室可以用B或C装置制

题型:实验题

问题:

实验室常用的几种气体发生装置如图A、B、C所示:

(1)实验室可以用B或C装置制取氨气,如果用B装置,写出相应的化学方程式_____________________________。检查C装置气密性是否良好的操作是___________________。

(2)气体的性质是气体收集方法选择的主要依据。下列性质与收集方法无关的是_____(填序号,下同。) ① 密度   ② 颜色   ③ 溶解性   ④热稳定性   ⑤与氧气反应

下图是某学生设计收集气体的几种装置,其中不可行的是________________

(3)若用A装置与D装置相连制取收集X气体,则X可能是下列气体中的_______

①CO    ② NO     ③ Cl2     ④H2

其中在D装置中连接小烧杯的目的是________________________。

考点:氨气的制取气体的收集、净化、干燥
题型:实验题

Dreams are expressions of thoughts, feelings and events that pass through our mind while we are sleeping. Everybody dreams. But only some people remember their dreams. Our dreams often include all the senses—smells, sounds, sights, tastes and things we touch. We dream in colour. Sometimes we dream the same dream over and over again. These repeated dreams are often unpleasant. They may even be nightmares—bad dreams that frighten us.

Early in the twentieth century, two famous scientists developed their personal ideas about dreams. Austrian psychiatrist Sigmund Freud published a book called “The Interpretation(诠释) of Dreams” in 1900. Freud believed people often dream about things they want but can’t have. These dreams often have something to do with sex and aggression(侵犯). Swiss psychiatrist Carl Jung worked closely with Freud for several years, but he believed dreams could help people grow and understand themselves. He believed dreams provide solutions(解答) to problems we face when we are awake. He didn’t believe dreams hide our feelings about sex or aggression. Today we know more about the science of dreaming because researchers can take pictures of people’s brains while they are sleeping.

Other researchers are studying how dreaming helps our bodies work with problems and very sad emotions(感情). Robert Stickgold is a professor of psychiatry at Harvard University in Massachusetts. Doctor Stickgold says that when we dream, the brain is trying to make sense of the world. He does not agree with Sigmund Freud that dreaming is the way we express our hidden feelings and desires(愿望).

Scientists believe it is important to keep researching dreams. Doctor Stickgold says it has been more than one hundred years since Sigmund Freud published his important book about dreaming. Yet there is still no agreement on exactly how the brain works when we are dreaming or why we dream.

请根据短文内容,选择最佳答案, 将其标号在答题卡上涂黑。(每小题2分,共10分)

小题1: Dreams _________.

A.are remembered by everyone

B.express all that we think in our mind

C.include few senses and things we touch

D.are sometimes nightmares that repeat and frighten us小题2: A book on dreaming was published by _________.

A.Sigmund Freud

B.Robert Stickgold

C.Carl Jung

D.the writer小题3: In the passage, all the psychiatrists _________.

A.believe dreams can help people understand all the problems that they face

B.think dreams always hide someone’s feelings about sex or aggression

C.study dream and dreaming and have their own ideas

D.have the same idea that people often dream about the things they want小题4: From the passage, we know that _________.

A.Jung thought that dreams provide solutions to problems we face when we are sleeping

B.Freud developed the idea that dreams are expressions of people’s hidden feelings

C.scientists have known quite well why we dream because they can take pictures of our brains

D.other researchers have discovered how dreaming helps our bodies work with problems and very sad emotions小题5:Which would be the best title(标题) for the passage?

A.The Explanations of Dreams

B.The Ways of Dreams

C.The Solutions to Dreams

D.The Mystery(奥秘) of Dreams and Dreaming

题型:实验题

疖与面部疔疮初起都有粟粒样脓头,诊断面部疔疮的依据是()。

A.红热高肿

B.疼痛剧烈

C.顶硬根深

D.痛痒交作

E.弥漫肿胀

题型:实验题

滴虫性 * * 炎正确的是()

A.病原体为比多核白细胞小的 * * 毛滴虫

B.病原体最适宜的pH为3.4

C. * * 局部治疗效果最好

D.白带增多,灰白稀薄泡沫状

E.患病后不影响受孕率

题型:实验题

Windows Server 2003企业版操作系统中,默认情况下()组不具备管理用户账户的权限。

A.Account operators

B.Domain admins

C.Enterprise admins

D.Server operators

题型:实验题

加氢精制过程中,可以对加氢工艺、催化剂和操作条件进行选择。按反应温度的不同加氢精制过程可分为()。

A.高温加氢和低温加氢两种

B.高温加氢、中温加氢和低温加氢三种

C.超高温加氢、高温加氢、中温加氢和低温加氢四种

D.超高温加氢、高温加氢、中温加氢、低温加氢和极限低温加氢五种

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