题目

He is now holding his throat with his face turning red, while his d friends were slapping him on the back. 答案：【1】desperate（2008•岳阳）如图，四边形ABCD是一正方形，已知A（1，2），B（5，2）（1）求点C，D的坐标；（2）若一次函数y=kx-2（k≠0）的图象过C点，求k的值．（3）若y=kx-2的直线与x轴、y轴分别交于M，N两点，且△OMN的面积等于2，求k的值．