已知方程x2+px+q=0的两个根分别是2和-3,则x2-px+q可分解为( )

题型:选择题

问题:

已知方程x2+px+q=0的两个根分别是2和-3,则x2-px+q可分解为(  )

A.(x+2)(x+3)

B.(x-2)(x-3)

C.(x-2)(x+3)

D.(x+2)(x-3)

考点:因式分解一元二次方程根与系数的关系
题型:选择题

黄河是中 * * 的摇篮,是我国开发整治的重点河流之一,读黄河流域示意图,完成下列问题。(16分)

(1)古诗云:“黄河之水天上来,”从河水补给角度可理解为       ____。古诗问:”百川东到海,何日复西归?”从水循环角度解释,通过________环流实现水汽输送,形成水的海陆间循环。(2分)

(2)黄河是北方河流,中游河段形成东西对称水系,常使河水在七、八月份有_______的特点,初春季时节在_________________部分河段易形成凌汛。(4分)

(3)黄河流域是我国缺水最严重的地区之一,与上游地区相比较,下游地区尤甚,这是因为上游地区                                                                。(4分)

(4)历史上有“黄河百害,唯富河套”之说。上游的宁夏、河套平原由于__________形成了富庶的农业区;“害”主要发生在它的________河段,消除水害的主要措施是                      

                                                                 。(4分)

(5)沿河地区资源丰富,按注重发展优势产业和特色产业的构想,在上游开发          

资源,为兰州发展化学、冶金等多种工业提供了有利条件;利用_________资源,在内蒙古、山西等省区发展高能耗工业。(2分)

题型:选择题

庞德将法律发展史的最初阶段定为()

A.严格法阶段

B.法律社会化阶段

C.衡平法和自然法阶段

D.原始法阶段

题型: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

题型:选择题

教育法规的保障作用,是指教育法规保障各种教育主体的教育权力得到实现,教育义务得到履行,从而使教育活动有序、有效地进行。()

题型:选择题

第一次工业革命最显著的标志是()

A.蒸汽机

B.飞梭

C.汽车

D.电子计算机

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