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有效性规则是用户对输入字段值的限制，下列规则的解释中，其中正确的一项是( )。

A．＜and＞0 要求输入一个非零值

B．0 or＞=80 输入的值必须等于0或大于等于80

C．Like"T" 输入值必须是以T结尾的四个字符

D．＜#1/1/2002# 要求输入一个2001年以后的日期

The culture of any society is usually thought to be of two kinds: material and nonmaterial. Material culture includes the man-made phenomena which have physical properties such as height, breadth, and weight. A boat, a machine, a house — all these objects are part of the material culture. The nonmaterial culture is that portion of the environment which surrounds man and which has an impact on his behavior but which lacks these material properties: values, beliefs, traditions, and all the other habits and ideas invented and acquired by man as a member of society. Contemporary sociological theory tends to assign primary importance to the nonmaterial culture in choosing problems for study. It assumes, for example, that boats, planes, automobiles, and so forth, are not nearly so important as the traditions we have developed which make their manufacture possible — indeed, which prescribe how we are to use them. The emphasis of contemporary sociology is to insist that the material culture would not exist had not the nonmaterial culture first been available to suggest the ideas which are embodied in the inventions of material culture.

托运人组织装车的货物，发站发现有哪些情事时，应有托运人改善后接受？

RAD的缺点不包括（）。

A.如果用户不能持续地参与整个生命周期中，最终产品会受到负面影响。

B.要求系统能适当模块化，如果没有可重用的组件，它的效率就会下降。

C.盲目应用时，会缺乏成本概念和项目完成的时间限制。项目有永远不能完结的风险。

D.工作重点从文档转为构建，所见即所得。

中国社会主义青年团三大决定团中央的负责人的职务名称是。（）

A.秘书

B.书记

C. * *