液化石油气的物理、化学性质是什么?
参考答案:
液化石油气无色透明,有烃类特殊气味,常温常压下,极易挥发,气化后体积迅速扩大250~350倍,比空气重1.5~2.0倍。
最大的市场需求是指对应于最大的()的市场需求。
A.市场预测
B.市场营销力量
C.市场营销费用
D.市场潜量
According to the passage, why would the landowners respond to environmental concerns
A.They wish to stimulate economic growth.
B.They wish to improve their public image.
C.They have a tradition of cooperating with the government.
D.They are afraid of federal legislation.