ASHTECHLocus接收机电开关键按下6秒钟,则()被删除。
参考答案:数据
()
A.5
B.17
C.19
D.47
If the admission price for a rock concert is raised from $25 to $30, causing ticket sales to drop from 60000 to 40000, the price elasticity of demand for tickets is:()
A. -0.25.
B. -0.50.
C. -2.20.