题目

It seems you are not _______. I seldom see you join any activity or play with other. A. cautious          B. outgoing          C. curious           D. patient   答案：B  词义辨析题。句意：你看起来不太爱交际，我很少看见你参加什么活动或是和别人玩。故空白处应填outgoing“爱交际的”。cautious“小心谨慎的”；curious“好奇的”；patient“耐心的”。  若直线y=3x+b与两坐标轴围成的面积为6个平方单位，则b=______.