在平行四边形ABCD中,DB=DC,∠C=70°,AE⊥BD于E,则∠DAE=

题型:填空题

问题:

在平行四边形ABCD中,DB=DC,∠C=70°,AE⊥BD于E,则∠DAE= (        )度 。

考点:平行四边形的性质
题型:填空题

下列各组词语中划线的字,注音全都正确的一组是………………………(   )(2分)

A.泣(chuò)酬(hè)蓄(zhú)吹毛求(chī)

B.挑(xìnɡ)桥(jiàn)朗(lùn) 深痛疾(wù)

C.狡(jié)职(chènɡ)干 (hé)相形见(chù)

D.污(huì)赠 (kuì)然(cù )长短叹(xū)

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2007年8月26日,南京市20名学生代表利用业余电台与太空中国际空间站上的宇航员成功对话.对话时用电台发射并接收_________,这种波在真空中的传播速度为_________m/s,其频率越高,波长越_________

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In this section you will find after each of the passages a number of questions or unfinished statements about the passage, each with 4 (A, B, C and D) choices to complete the statement. You must choose the one which you think fits best. Then blacken the corresponding letter as required on your Machine-scoring ANSWER SHEET. The time for this section is 70 minutes.

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 regulates the manner in which deviants are treated.

Social control refers to processes by which______.

A.norms are developed

B.norms are enforced

C.people are educated and trained

D.people are rewarded and punished

题型:填空题

如图反应的微观示意图,其中“”和“”表示不同元素的原子下列书法正确的是(  ) 

A.反应前后原子数目发生改变

B.反应前后分子种类发生改变

C.参加反应的两种原子个数比为1:2

D.参加反应的两种分子个数比为1:2

题型:填空题

男性,50岁。肝区持续性钝痛2个月,疼痛可牵涉至右肩部,伴乏力,消瘦明显,食欲减退,有恶心、低热症状。查体发现右肋下可扪及肿大之肝脏,质地坚硬。

下列实验室检查最有诊断价值的是()

A.测定血清γ-谷氨酰转肽酶

B.测定血清碱性磷酸酶

C.甲胎蛋白测定

D.测定SGPT和SGOT

E.乳酸脱氢酶和同工酶测定

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