假定某厂商需求如下：Q=5 000-50P。其中，Q为产量，P为价格。厂商的平均成本
题型：问答题
问题：
假定某厂商需求如下：Q=5 000-50P。其中，Q为产量，P为价格。厂商的平均成本函数为：
(1)使厂商利润最大化的价格与产量是多少最大的利润水平是多少 (2)如果政府对每单位产品征收10元税收，新的价格与产量是多少新的利润水平是多少
题型：问答题
阅读理解。
A teacher asks his students to write about their dreams. One boy writes seven pages. He wants his
own farm and a large house on it.
But his teacher tells him, "You are daydreaming. Do it again. "
Several days later the boy hands in the same article. "I don't want to give up my dream even if you fail
me. "
Years later, he makes his dream come true. One day, the same teacher takes some students to the boy's
farm for camping. Seeing the big farm, the teacher feels sorry: "I once told you not to daydream.
Luckily, you never gave up. "
1. The teacher asks his students to _____.
A. dream
B. write about dreams
C. tell stories about dreams
2. What does the underlined sentence mean?
A. Your dream will never come true.
B. You're sleeping.
C. Your article is pretty good.
3. The second time, the boy hands in the same article because he _____.
A. wants to make his teacher angry
B. doesn't know how to write
C. won't give up his dreams
4. After many years, the boy _____.
A. is still daydreaming
B. owns a bi
g farm
C. loses his life
5. We can tell from the story that _____.
A. dreaming is not good
B. your dream may come true if you don't give up
C. 
daydreaming can make you rich