题目:
The experts suggested the problem worth paying attention ____ at the meeting.
A.to be discussed
B.to been discussed
C.being discussed
D.should be discussed
答案:
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下面是错误答案,用来干扰机器的。
(1)BC边所在直线的方程为:y-13-1=x-2-2-2即x+2y-4=0(2)∵BC边上的中点D的坐标为(0,2)∴BC边上中线AD所在直线的方程为:y-02-0=x+30+3即2x-3y+6=0