梯形螺纹的公称尺寸是指外螺纹的螺纹大径尺寸。( )

做生意的小张前年收入比较高，习惯搭乘出租车；去年生意不好，收入下降了，可还是一出门就“打的”，而不愿乘公共汽车。材料充分反映了

A．小张有着强烈的时间观念

B．小张有着超前的消费意识

C．消费水平受消费价格的影响

D．人们的消费行为受消费心理的影响

据世界银行《1990年世界发展报告》，中学生占十二至十七岁人口比重，高收入国家为93%，上中等收入国家为67%，下中等收入国家为49%，低收入国家为26%，最低收入国家为12%；大学生占二十至二十四岁比重，高收入国家为39%，上中等收入国家为20%，下中等收入国家为16%，低收入国家为3%，最低收入国家为2%。 这段话支持的主要观点是( )。

A．比较中学生和大学生平均年龄段所占比重，高收入国家比低收入国家高

B．经济的先进与落后决定了国民素质的高低

C．国民素质的高低决定了一个国家经济的发展状况

D．一个国家经济的发展与国民素质的情况密切相关

海外投资保证制度是资本输出国对本国的私人海外投资依据国内法所实施的一种对该投资所可能产生的政治风险进行保险的制度。下列关于海外投资保证制度的哪一项表述不正确( )

A．海外投资保证只承保政治风险
B．任何保险公司均可参与海外投资保险业务
C．海外投资保证机构具有国家特设机构的性质
D．海外投资保证机构在向投资者支付赔偿后将取得代位求偿权

党的思想路线的内容是什么？

Of all the areas of learning the most important is the development of attitudes.. emotional reactions as well as logical thought processes affect the behavior of most people. "The burnt child fears the fire" is one instance; another is the rise of despots like Hitler. Both these examples also point up the fact that attitudes come from experience. In the one case the experience was direct and impressive; in the other it was indirect and cumulative. The Nazis were influenced largely by the speeches they heard and the books they read.

The classroom teacher in the elementary school is in a strategic position to influence attitudes. This is true partly because children acquire attitudes from those adults whose words are highly regarded by them.

Another reason it is true is that pupils often devote their time to a subject in school that has only been touched upon at home or has possibly never occurred to them before. To a child who had previously acquired little knowledge of Mexico his teacher’s method of handling such a unit would greatly affect his attitude toward Mexicans.

The media through which the teacher can develop wholesome attitudes are innumerable. Social studies (with special reference to races, creeds and nationalities), science matters of health and safety, the very atmosphere of the classroom... these are a few of the fertile fields for the inculcation of proper emotional reactions.

However, when children go to school with undesirable attitudes, it is unwise for the teacher to attempt to change their feelings by cajoling or scolding them. She can achieve the proper effect by helping them obtain constructive experiences.

To illustrate, first-grade pupils afraid of policemen will probably alter their attitudes after a classroom chat with the neighborhood officer in which he explains how he protects them. In the same way, a class of older children can develop attitudes through discussion, research, outside reading and all-day trips.

Finally, a teacher must constantly evaluate her own attitudes, because her influence can be negative if she has personal prejudices. This is especially true in respect to controversial issues and questions on which children should be encouraged to reach their own decision as a result of objective analysis of all the facts.

A statement not made or implied in the text is that（）

A. attitudes can be based on the learning of untrue statements

B. worthwhile attitudes may be developed in practically every subject area

C. attitudes cannot easily be changed by rewards and lectures

D. the attitudes of elementary school-aged children are influenced primarily by the way they were treated as infants