对多边形进行面积量算进，可在图上确定多边形各顶点的坐标，直接用坐标计算面积。（）
参考答案：对
1.He did not find a job yet because he had no _____ to men who could help him.
A. approach B. application C. access D. approval
2.The old man got into the _____ of storing money under the bed.
A. tradition B. habit C. use D. custom
如果弹性大于1，需求是富有弹性还是缺乏弹性？如果弹性等于零，需求是完全有弹性还是完全无弹性？
