题干

已知△ABC的三个顶点分别为A(﹣3,0),B(2,1),C(﹣2,3),试求:
上一题 下一题 0.0难度 选择题 更新时间:2014-01-23 01:45:51

答案(点此获取答案解析)

同类题3

阅读理解

    There are two great trends on parents bringing up children today.First,children are now praised to an unbelievable degree.As Dorothy Parker once joked,American children aren't raised;they are motivated.Children are constantly told how special they are.The second is that children are honed(磨砺) to an unimaginable degree.Parents spend much more time than in past generations on their children's development.

    These two great trends—greater praise and greater honing—combine in close ways. Parents shower their kids with affection,but it is intermingled with the desire to help their children achieve success.Parents are happy when their child studies hard,practices hard,wins first place,gets into a famous college.

The wolf of conditional love is hidden in these homes.The parents feel they love their children in all circumstances.But the children often think differently.They feel that childhood is a performance—on the athletic field,in school and beyond.The shadowy presence of conditional love produces a fear,the fear that there is no completely safe love.

    Meanwhile,children who are uncertain of their parents' love develop a great hunger for it. This conditional love is1ike an acid that affects children's criteria to make their own decisions about their own colleges,majors and careers.At key decision-points,they unconsciously imagine how their parents will react.

    These children tell their parents those things that will bring praise and hide the parts of their lives that won't. Studies suggest that children who receive conditional love often do better in the short run.They can be model students.But they suffer in the long run. They come to hate their parents.They are so influenced by fear that they become afraid of risk.

    Parents today are less likely to demand obedience(顺从) with explicit rules and lectures.But they are more likely to use love as a tool to exercise control. But parental love is supposed to ignore achievement. It's meant to be an unconditional support -a gift that can not be bought and cannot be earned.

同类题4

阅读材料,回答问题。

材料一:今我朝罢丞相,设五府、六部、都察院、通政司、大理寺等衙门,分理天下庶务……事皆朝廷总之……以后子孙做皇帝时,并不许立丞相。臣下敢有奏请立者,文武群臣即时劾奏,将犯人凌迟全家处死

——《皇明祖训》

材料二:1912年,《中华民国临时约法》颁布,规定中华民国主权属于全体国民。参议院行使立法权,有权选举临时大总统、弹劾临时大总统及国务员,临时大总统及国务员行使行政权,国务员“辅佐临时大总统,负其责任”,“法官独立审判不受上级官厅之干涉”。

——据人民版《历史·必修一》等整理

材料三:1954年制定的《中华人民共和国宪法》规定:“中华人民共和国是工人阶级领导的、以工农联盟为基础的人民民主国家。”“中华人民共和国的一切权力属于人民。人民行使权力的机关是全国人民代表大会和地方各级人民代表大会。”……自此,中华人民共和国的基本政治制度确立起来。经过二十多年的实践探索,邓小平同志指出:“必须使民主制度化、法律化,使这种制度和法律不因领导人的改变而改变,不因领导人的看法和注意力的改变而改变。”八十年代初,政治体制改革也本着“发扬民主,加强法制”的精神迈出新的步伐

——摘自全冲及《二十世纪中国史纲》