题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183954-80399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183954-95984.png)
A.9 | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:作出可行域如图所示,
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183955-29863.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183955-43074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183955-82487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183955-21139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183956-64942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183955-29863.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183954-35273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016183956-93244.jpg)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000724-74564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000725-21303.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000726-12205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000726-96014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000726-80918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-85238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-44604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000726-80918.png)
①集合
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-36525.png)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-71648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-18546.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-35696.png)
③若
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-75534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-18546.png)
④若
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000727-30639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000726-80918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000728-27709.png)
其中正确的结论是 .(填上你认为所有正确的结论序号).
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000732-10290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000732-53758.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000732-67881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000732-60870.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000732-50848.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000732-67881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000734-46203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000734-49228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000735-97398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000737-77075.png)
①
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000737-32389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000737-86932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000737-46098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000737-52063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815000738-47940.png)
最新试题
- 1若方程(x+3)2-k=0没有实数根,则k的取值范围是______.
- 2— Did Mary go to the exhibition yesterday? — Yes, but she __
- 3如图所示为逻辑电路,根据电路图完成它的真值表.其输出端从上到下排列,结果正确的是( ) A.0,0,1,1B.0
- 4依次填入下面一段文字横线处的语句,衔接最恰当的一组是恶性读书,等于恶性吃金鱼,而其起因,是源于恶性考试。
- 5下列物质发生的变化与空气的成分无关的是[ ]A.钢铁在空气中生锈B.生石灰在空气中变质C.烧碱固体在空气中潮解、
- 6已知P(AB)=,P(A)=,则P(B|A)=( )。
- 7A根据句意,写出括号内所给单词的适当形式。1.The woman’s __________(happy) made ev
- 8读垂直自然带与相应水平自然带理论上的对应关系图。1.①~④地水平自然带的分布差异以_________为基础,体现了___
- 9强强说:“我的东面是东半球,西面是西半球,南面是南半球,北面是北半球。”你知道她站在哪里吗? ( )A.
- 10历史图片是历史场面的直观反映,下面一组图片见证了历史上朝代的更替、诉说了奴隶制王朝的兴衰变迁,其中讲述了商朝灭亡、西周建
热门考点
- 1(1)-(-5)=______;(2)-[-(+2)]=______.
- 2已知平面向量a=(cosφ,sinφ),b=(cosx,sinx),c=(sinφ,-cosφ),其中0<φ<π,且函数
- 3(1)某校生物研究小组去动物园调查研究动物的种类,动物园里动物非常多,有蝴蝶、海豹、热带鱼、鸵鸟等,这些动物中,属于节肢
- 4健康的生活方式有利于提高我们的生活质量。下列选项中属于健康生活方式的是( )A.熬夜学习到凌晨B.为忘掉忧愁而酗酒C
- 5某无色溶液中,已知含有H+、Al3+、Mg2+等阳离子,逐渐加入NaOH溶液,则消耗NaOH溶液体积(X轴)和生成沉淀(
- 6The table manners are different _____ ours.[ ]A. of B. f
- 7奥运来了,让我们一起去看看奥运会的二大标志性建筑.国家游泳中心又被称为“水立方”(Water Cube),位于北京奥林匹
- 8在直角坐标系中,如果点A在x轴的正半轴上,点B(-1,0)、C(2,4),那么cos∠ABC等于( )A.45B.54
- 9小芳同学利用某品牌热水器烧水,她在水箱中注入了150L水,若水的温度为25℃.将这些水加热到75℃时,水吸收了多少热量?
- 10推理是学习化学的一种重要方法,但不合理的推理会得出错误的结论。以下推理正确的是A.含碳元素的物质充分燃烧会生成CO2,那