最大波及系数
参考答案：
在开发设计的注采井网下，注人流体所能触及的IL隙体积和开发区孔隙体积之比。
For a linear demand curve, at the price where elasticity is -2.0, reducing prices will: （）
A. increase total revenue and we are at the point of maximum total revenue.
B. decrease total revenue and we are not at the point of maximum total revenue.
C. increase total revenue and we are not at the point of maximum total revenue.
B．由于阻力的作用，滑行在冰面上的木块慢慢停下来
C．两个物体只有相互接触才有力的作用
D．不管是否有施力物体，力都可以存在
