Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.整体法与隔离法1如图有一箱装得很满的土豆以一定的初速度在动摩擦因数为μ的水平地面上做匀减速运动不计其他外力及空气阻力则中间一质量为m的土豆A受到其他土豆对它的作用力大小应是 ( )A. mg B. μmg
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.一根轻质弹簧一端固定用大小为F1的力压弹簧的另一端平衡时长度为l1改用大小为F2的力拉弹簧平衡时长度为l2弹簧的拉伸或压缩均在弹性限度内该弹簧的劲度系数为A. B. C. D.2.如
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.2010年高考磁场1.2010·重庆·21如题21图所式矩形MNPQ区域内有方向垂直于纸面的匀强磁场有5个带点粒子从图中箭头所示位置垂直于磁场边界进入磁场在纸面内做匀速圆周运动运动轨迹为相应的圆弧这些粒子的质量电荷量以及速度大小如下表所示由以
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1用min{abc}表示abc三个数中的最小值.设f(x)min{2xx210-x}(x≥0)则f(x)的最大值为( )A.4 B.5 C.6 D.72若函数
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1函数的定义域是( ) A. B. C. D. 2 设函数y=f(x)的图象关于直线x=1对称在x≤1时f(x)=(x1)2-1则x>1时f(x)等于( )A f(x)=(x3)2-1
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1函数的定义域是( ) A. B. C. D. 2 设函数y=f(x)的图象关于直线x=1对称在x≤1时f(x)=(x1)2-1则x>1时f(x)等于( )A f(x)=(x3)2-1
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.问题1:切线问题1.曲线在点处的切线方程为_________.2.点在曲线上移动时过点的切线的倾斜角的取值范围是? (??? )A. ??????B.???????? C.???????????????? D. 3.直线与曲线相切于点则的值为
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.例1.若曲线在x处的导数为且曲线经过点A(13)求解析式解:过A ∴ ∴ 例2.求下列定积分:(1)(2)∵ ∴ 例3.为何值时M最小.解:∴ 时例4.已知试求的取值范围解:即设 ∴ 为方程两根 ∴
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.已知U={实数对(xy)} A={(xy)lg(y-4)-lg(x-2)=lg3}B={(xy)3x-y-2=0} 则?UA∩B=________.2.若x∈[25]或x∈{xx<1或x>4}是假命题则x的取值范围是 ______
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd. 求取值范围1.在平面直角坐标系中已知点直线 经过点且与线段相交.则直线 倾斜角的取值范围是A. B. C. D.C2.当a>0时设命题P:函数在区间(12)上单调递增命题Q:不等式对任意x∈R都成立
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.17.设函数在点处可导试求下列各极限的值.1.2.1下列四组函数中导数相等的是( ) 2下列运算中正确的是( ) 3设则等于( ) 4对任意的有则此函数解析式可以
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.已知过两点的直线与直线平行则的值为A. B. C. D. 2.在平面直角坐标系中矩形将矩形折叠使点落在线段上设折痕所在直线的斜率为K则K的取值范围
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.元素化合物专题训练1.(2011江苏高考3)下列有关物质的性质和该性质的应用均正确的是A.常温下浓硫酸能是铝发生钝化可在常温下用铝制贮藏贮运浓硫酸B.二氧化硅不与任何酸反应可用石英制造耐酸容器C.二氧化氯具有还原性可用于自来水的杀菌消毒D.铜
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.一轮复习专题——有机化学推断题(4)1. 已知两个羟基同时连在同一碳原子上的结构是不稳定的它要发生脱水反应:现有分子式为C9H8O2X2(X为一未知元素)的物质M可在一定条件下发生下述一系列反应:试回答下列问题: (1)X为
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.13.下列叙述中符合历史史实的是 A.卢瑟福的α粒子散射实验揭示了原子核有复杂结构B.玻尔理论成功地解释了各种原子的发光现象C.爱因斯坦成功地解释了光电效应现象D.赫兹从理论上预言了电磁波的存在xmym01.0P甲2.0tsym00.
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.2011四川生物试题答案及解析一选择题(本题共13小题每小题6分在每小题给出的四个选项中只有一项是符合题目要求的)1.下列关于微生物生长曲线的叙述不正确的是A.在相同培养条件下接种对数期的菌种调整期将缩短B.进入对数期的微生物代谢旺盛形态和生
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.11.(2005年广东)NA为阿伏加德罗常数下列说法正确的是 A.10g甲烷所含有的电子数目为10NA B.常温常压下4g氦气所含有的中子数目为4NA C.标准状况下22.4L单质溴所含有的原子数目为2NA D.电解食盐水若产
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.下图为某区域路网示意图下表为当地路况据此完成12题 道路编号长度(千米)车速(千米小时)13602460366041590556646743085309630108601110601.若你是救护人员要在最短时间内由Z点赶到S点救助伤者你该
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.从图形的一点出发笔不离开纸每条边只画一次不准重复这样画出的图形就叫一笔画判断能否一笔画:1连通图形2有两个奇点或没有奇点奇点:与奇数条边相连的结点偶点:与偶数条边相连的结点1下列哪些图形可以一笔画