试题与答案

实践是检验真理的唯一标准,是因为实践 A.人的能动活动 B.人的创造性活动: C.把

题型:多项选择题

题目:

实践是检验真理的唯一标准,是因为实践

A.人的能动活动

B.人的创造性活动:

C.把认识和客观联系起来的桥梁、中介

D.具有直接现实性的优点

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:窝洞的点线角太锐,导致应力集中。充填体过高、过陡,引起颌创伤。龋齿一次性充填后的激发痛是由于垫底材料选择不当刺激牙髓引起的;充填物折裂是由于充填物厚度不够。

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题型:单项选择题

在Access中已建立了“学生”表,表中有“学号”、“姓名”、“性别”和“入学成绩”等字段。执行如下SQL命令:Select性别,avg(入学成绩)From学生Group by性别其结果是。

A.计算并显示所有学生的性别和入学成绩的平均值

B.按性别分组计算并显示性别和入学成绩的平均值

C.计算并显示所有学生的入学成绩的平均值

D.按性别分组计算并显示所有学生的入学成绩的平均值

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题型:单项选择题

In considering how the American family is changing, the starting point is the traditional family. a form which has developed over time on the basis of a number of assumptions. It is assumed that the family is heterosexual (异性的) institution, with prescriptions about how a man and a woman ought to be joined together and live together. The proper family form is assumed to be the nuclear family, that is, a family composed of a married man and woman and their children. It is assumed that the husband is the head of the family, with ultimate authority over wife and children, and that in their clearly separated roles the husband is the income-earner and the wife is the homemaker and provider of child care. It is assumed that the family lives by itself in its own house or residence.

Observers of family life have suggested that numerous changes are taking place in this traditional American family form. Included are the following general observations about trends:

More men and women seem to be living together before getting married.

Women and men seem to be marrying at a later age.

Married couples are having fewer children.

Unmarried women appear to be having more children.

Wives, even mothers with small children, are increasingly likely to be employed outside the home.

Marriages are more likely to end with divorce.

Single-parent families are more prevalent.

Remarriage is likely to follow divorce rather than widowhood.

Remarriage rates are declining, especially for women.

Some trends, viewed in a long-range historical context, appear not to be trends at all. The age at which men and women normally marry is the same now as it was 100 years ago, though it has fluctuated (变动,波动); a short-range increase in the 1940s and 1950s due to widespread postponement of marriage in war time made it appear that a change had occurred. Other trends appear to be following established patterns rather than representing a sharp break with tradition. Divorce rates have been increasing and families have been having fewer children for well over a century. Single-parent families and stepfamilies were very common in the past, although the reason for them was different. Many marriages formerly are dissolved and followed by remarriage because of the death of a parent or partner. Today single parenthood and remarriage are more likely to be a response to divorce.

Some social scientists see in these changes the breakdown of the family, to the detriment of the society. We take the position that family institutions and systems, like all human systems, are open, take many forms, and are constantly changing.

The author holds the position that family institutions and systems are ().

A. likely to breakdown, causing harm to the society

B. likely to stop changing in the near future

C. presenting new problems to the society

D. open and constantly changing

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