已知a、b是一元二次方程x2-x-1=0的两个根,则代数式3a2+2b2-3a- 发布时间:2017-04-23 19:56 │ 来源:www.tikuol.com 题型:填空题 问题: 已知a、b是一元二次方程x2-x-1=0的两个根,则代数式3a2+2b2-3a-2b的值等于______.
题型:填空题 综合填空,选择正确的词语并用适当形式填空,每词限用一次。something, help, an, not work, in, check Linda lives 1._____ Apartment 606, Building A, Green Community. There is 2._____ old kitchen fan in her house. She often uses it. But today, it 3._____. Linda thinks there is 4._____ wrong with the kitchen fan. So she calls the Community Service Center for 5._____. The man in the Service Center says theywill get someone 6._____ it right now. Linda thinks they are very nice. 查看答案
题型:填空题 进行关节活动度测定的注意事项不包括()A.保持正确体位B.被动运动关节时手法要柔和C.注意保暖,避免充分暴露关节D.防止邻近关节的替代动作E.应注意避免在运动后立即评定关节活动度 查看答案
题型:填空题 鉴别下列各组物质的方法不正确的是选项鉴别的物质鉴别的方法A纯水和矿泉水观察是否澄清B二氧化碳和一氧化碳点燃,观察是否能燃烧C水和过氧化氢溶液加二氧化锰,观察是否有气泡 D冰和干冰室温(20℃)放置,过一段时间观察是否有液体残留 查看答案