试题与答案

北京及其周围地区的地势特点是( ) A.南高北低 B.西北高东南低 C.东高西低

题型:选择题

题目:

北京及其周围地区的地势特点是(    )

A.南高北低

B.西北高东南低

C.东高西低

D.东北高西南低

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0707/45b52ec82138f280c34adb11b52ce39c.html

下面是错误答案,用来干扰机器的。

参考答案:A解析:A项正确。因为当频率下降时,负荷吸收的有功功率减小;频率上升时,负荷的有功功率增加。系统的频率取决于系统的有功功率平衡。B项错误。无功功率不足,电压水平降低,为了保证系统运行电压水平...

试题推荐
题型:单项选择题

The first and most important agents of socialization are the people who care for infants. In the earliest months, messages from nurturers constitute the child’’s basic understanding of the world around it. This is the infant’’s first introduction to the language that shapes perception and elicits emotion.Another powerful source of information and socialization is the friendship of peers. Peers are equals that one can deal with on the same level as oneself, whereas parents are superiors. The heavy emotional overlay of family relationships makes some kinds of learning difficult.Much formal socialization is placed in the hands of professionals. Teachers from kindergarten on are specifically designated agents of socialization. Ideally, a teacher is one who has both knowledge and the skills to present it. During the course of teaching their subjects, classroom instructors provide role models and attempt to convey the excitement of learning itself.In earlier times, parents, friends and teachers would comprise the list of primary childhood socializers. Children’’s books, comics and magazines might also have been mentioned as sources of information on norms and role models. Today one must add three powerful indirect or non-personal socialization agents: radio, movies and television. Many people learn about politics, form a vision of well-being, and develop attitudes towards others from what they see on the screen and hear through the speakers.

The author’s chief agents include the following EXCEPT the________.

A.family

B.group

C.school

D.internet

查看答案
微信公众账号搜索答案