Hide one’s light under a bushel的意思是____________.

Suppose that when the price of corn is $2 per bushel, farmers can sell 10 million bushels. When the price of corn is $3 per bushel, farmers can sell 8 million bushels. Which of the following statements is true?_________.

A<br/>farmer has the ability to grow either corn or cotton or some<br/>combination of the two. Given no other information, it follows that<br/>the farmer’s opportunity cost of a bushel of corn multiplied by<br/>his opportunity cost of a bushel of cotton ( ) A: is<br/>equal to 0. B: is<br/>between 0 and 1. C: is<br/>equal to 1. D: is<br/>greater than 1.

Which of the following describes comparative advantage? A: To produce a bushel of wheat Farmer John must give up 2 bushels of corn whereas Farmer Ben must give up 3 bushels of corn. B: Company A can produce 4 boxes of cereal in a day whereas Company B can produce 5 boxes of cereal in a day. C: Firm A can produce a good at a cost of $3 and Firm B can produce the good at a cost of $4. D: Jane can type 50 words per minute and Joe can type 60 words per minute.