已知x=1是方程x2+bx-2=0的一个根,则b的值是______;方程的另一个

题型:填空题

问题:

已知x=1是方程x2+bx-2=0的一个根,则b的值是______;方程的另一个根是______.

考点:一元二次方程的解法一元二次方程根与系数的关系
题型:填空题

顶棚抹灰线的弹线找规矩,根据墙上150cm的水平准线,按照施工图样上灰线尺寸的要求,用钢皮尺或尺杆从150cm的水平准线向上量出弹线的尺寸,房间四周都要量出,然后用粉线甩在四周的立墙上弹一条水平准线。( )

题型:填空题

本人知道他人以本人名义实施民事行为而不作否认表示的,对该行为应由()承担责任。

A.该他人

B.本人

C.第三人

D.本人与借用其名义的他人

题型:填空题

关于区域的叙述错误的是[ ]

A、区域具有一定的地理位置,是一个可度量的实体

B、区域划分的指标有自然、经济和社会的某一方面,也有综合性的

C、按照指标的不同,区域可分为自然区、经济区、文化区、行政区、综合区等

D、区域内部地理环境完全一致,区域与区域之间存在较大的差异

题型:填空题

Americans’ (1) impulses keep generating surprises. Charitable giving plays an even larger role in the (2) . Demand for nonprofit services gets proportionately bigger as a locality’s (3) rises. The philanthropy of the wealthy may not hinge on tax (4) to the degree many believe. The US (5) the world in levels of charitable activity. Some experts see charity as a (6) trait of the US, more than (7) or business. But those forces may be (8) , as many nonprofits, from healthcare to classical music are selling (9) in a marketplace alongside for-profit (10) . Charity is no mere (11) activity. It pays off for society in ways that may (12) the rates of return on many traditional investments. Charity not only helps those on the (13) end but also strengthens the (14) of society at large. Moreover, it appears to make the givers themselves more (15) . The pattern that conservatives are better givers than (16) is less about politics than about charity-linked (17) most common to conservatives, religious commitment, marriage and children, and entrepreneurship. The main point is that more Americans, regardless of ideology, embrace giving as a tool for (18) . The urge to make a difference, and to take (19) in it, outweighs (20) considerations.

题型:填空题

燃气轮机燃烧室有何功用,燃烧室的工作特点是什么,电站对燃烧室有哪些基本要求?

更多题库