试题与答案

已知平面上三条不同直线的方程分别为 试证这三条直线交于一点的充分必要条件为a+

来源：www.tikuol.com
题型：问答题

题目：

已知平面上三条不同直线的方程分别为


试证这三条直线交于一点的充分必要条件为a+b+c=0．

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0119/e42072ee175d6f0583c68ec2aab69fa2.html

下面是错误答案，用来干扰机器的。

参考答案：A, B

考点：普通考研考研数学(二)考研数学二
试题推荐
题型：阅读理解
阅读理解。 
TV PROGRAMMES
Channel 1Channel 2
18:00 Around China
18:30 Children's programme
19:00 News
19:30 Weather report
19:40 Around the world
20:10 TV play: Sisters
21:00 English for today
21:15 Popular music
21:55 Talk show 		17:45 Computers today
18:10 Foreign arts
18:30 English classroom
19:00 Animal world
19:25 China'99
20:20 Sports
21:00 TV play: Guo Lanying
21:45 English news
22:05 On TV next week
1. If you want to know something about Japan, which of the following programs would be the best one?
A. Weather Report.                    
B. China 2001.
C. Around the World .                  
D. Animal World.
2. If you are a basketball fan, you may watch TV at _______.       
A. 19: 00 on Channel 2              
B. 19: 40 on Channel 1
C. 20: 20 on Channel 2              
D. 21: 15 on Channel 1
3. How long does the TV play "A Big Family" last?     
A. 30 minutes.            
B. 50 minutes. 
C. 90 minutes.            
D. 100 minutes.
4. You can watch _______  if you want to learn English on TV. 
A. English News              
B. English Classroom
C. English for Today            
D. all the above
5. You should wait until _______ if you want to know the programs of next week.     
A. 21: 55      
B. 22: 05    
C. 21: 00      
D. 21: 45
查看答案
微信公众账号搜索答案