【判断题】※在水溶液中,测得H+的含量为10-2mol/L,则该溶液的pH值是12。
【判断题】※在水溶液中,测得H+的含量为10-7mol/L,则该溶液的pH值是7。
【判断题】※在水溶液中,测得OH-的含量为10-2mol/L,则该溶液的pH值是12。
【单选题】If firms are making positive economic profits in the short run, then in the long run:
A.
the short-run industry supply curve will shift leftward.
B.
firms will enter the industry.
C.
industry output will rise and the price will rise.
D.
firms will leave the industry.
【判断题】在水溶液中,测得OH-的含量为10-4mol/L,则该溶液的pH值是4。
【简答题】短期均衡和长期均衡(short-run and long-run equilibrium)