(1)(4分)下列有关实验操作或结果的说法中正确的是 A.将pH试纸用蒸馏水湿润

题型:实验题

问题:

(1)(4分)下列有关实验操作或结果的说法中正确的是                 

A.将pH试纸用蒸馏水湿润后,测量某溶液的pH

B.把铜片和铁片紧靠在一起浸入稀硫酸中,铜片表面出现气泡

C.滴定管洗净后经蒸馏水润洗后,即可注入标准液进行中和滴定实验

D.电解盐酸溶液后(盐酸过量),再通入一定量HCl气体时,电解质溶液可恢复到和原来一样E.用广泛pH试纸测量Na2S溶液的pH时,得pH=10.5

F.实验室在配制FeCl3溶液时,先将FeCl3溶于一定量的浓盐酸中,再加蒸馏水稀释至所需浓度

(2)(6分)某同学在帮助老师整理实验室的化学试剂时,发现一盛有无色溶液的试剂瓶,标签破损(如右图),请你根据已掌握的知识,对该试剂可能是什么物质的溶液作出猜想,并设计实验加以验证。

①猜想:这种试剂可能是_____________________;

②简述验证的实验方案:                                             

考点:物质的分离离子的检验粗盐的提纯
题型:实验题

美国期货市场中介机构的()与我国的期货公司类似。

A.期货佣金商(FCM)

B.介绍经纪商(IB)

C.场内经纪人(FB)

D.助理中介人(AP)

题型:实验题

在相距200米的两个凉亭之间栽树,每隔25米栽一棵,能栽几棵树?

题型:实验题

对鸦片战争前中国社会状况的表述,正确的是  [ ]

A.中国资本主义经济占统治地位

B.自然经济在中国社会经济中占据主导地位

C.封建自然经济已经解体

D.成为世界资本主义经济的附庸

题型:实验题

下列不属于留置权特征的是()。

A.留置权是以动产为标的物的一种担保物权

B.留置权是债权人留置债务人动产的权利

C.留置权是以不动产为标的物的一种担保物权

D.留置权是一种法定担保物权

题型:实验题

Social control refers to social processes, planned or unplanned, by which people are taught, persuaded, or forced to conform to norms. In every society, some punishments or negative sanctions are established for deviant behavior. Without deviant behavior there would not be need for social control and without social control there would not be a way of recognizing the boundary between the acceptable and the unacceptable.Social control may be either formal or informal. Informal mechanisms include expressions of disapproval by significant others and withholding of positive rewards for disapproved behavior. Most people internalize norms in the course of socialization. This is any group’’s most powerful protection against deviance, in that the individual’’s own conscience operates as an agent of social control. When informal sanctions fail, formal agents of social control may be called upon. In contemporary society, such formal agents and agencies include psychiatry and other mental health professions; mental hospitals; police and courts of law; prisons; and social welfare agencies. All these formal agents function to limit, correct, and control violation of norms. Conflict theorists would also point out that social control agents and systems tend, in any society, to serve the interests of powerful groups and to enforce the norms most beneficial to those who make the rules and who, therefore, define unacceptable behavior.Social control, whether formal or informal, has a dual function. First, it punishes the wrongdoer and reaffirms the boundaries of acceptable behavior. Second, and less recognized, it regu lates the manner in which deviants are treated.

Which statement about social control agents is NOT true

A.They tend to serve the interest of those who enforce the norms.

B.They tend to serve the interest of those who receive a benefit.

C.They tend to serve the interest of those who make the rules.

D.They tend to serve the interest of those who are powerful.

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