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B.usually decreases as more of the good is produce
C.is measured by the amount of the other good that must be given up
D.is measured by the additional resources that must be used to produce the good
E.is usually constant
答案
更多“When moving along a production possibilities frontier, the opportunity cost to society of obtaining …”相关的问题
第1题
(1) to tell them when and where you are moving;
(2) to inform. them of your offer;
(3) to invite them to come.
第2题
第3题
Read the following passage and the statements that follow. Choose the best answer for each statement from the three choices marked A, B and C .
Outdoor Learning Environment
“How do they get the tomato on the vine(藤、蔓)？”
The question shocked Hillis. It reminded him of the time five years ago when he was volunteering at Beattie Elementary School in his daughter’s kindergarten classroom. He’d been reading the children a book about gardening.
“These kids had only seen vegetables in supermarkets,” he says. “I felt that something important was missing in their lives.”
So he went to work. Hillis and his wife, Sally, made the local government believe that it was necessary to create an outdoor learning environment. He and other volunteers raised more than 30,000 dollars to make such a project. The project was designed like the Platte River. Like the river, the school’s front walkway turns east to west, so they planted things along the walkway, such as native grasses which can be found along the river too.
Today, students are greeted every day by the cedar-mulched creation(雪松覆盖的表面), which spreads the length of three city blocks. In the back, there’s a garden, with twenty 1 ton rocks lying in the ground, where teachers hold classes.
The outdoor effort has changed things inside, too. For science, children plant seeds and, based upon each seed’s size and weight, guess how large a vegetable will grow to become. For arts and crafts, they collect fallen leaves and make designs out of them. Other science lessons make up a large part of the outdoor learning process. “No matter what time of the year it is,” Hillis says, “there’s always something going on.”
1.Hillis was a volunteer at Beatte Elementary School five years ago().
A.Right
B.Wrong
C.Doesn’t say
2.Halloween was first celebrated by the()around the fifth century.
A.English
B.American
C.Irish
D.European
3. The purpose of this course is to make the students know various rules of English grammar().
A.True
B.False
C.Not Mentioned
4.Students can tell how large a tomato will grow to become according to the seed’s size().
A.Right
B.Wrong
C.Doesn’t say
5.Craftsmen need knives and gravers of various types to make complicated patterns().
A.Right
B.Wrong
C.Doesn’t say
6. Which of the following doesn’t belong to the western culture()？
A.Europe
B.North Africa
C.Asia
D.America
7. What is the author’s main idea in the text()？
A.Education can be purchased
B.The difference between education and schooling
C.Degree is worthless
D.Students should learn more important knowledge
8. The settlers also taught the Indians to penetrate the forest, to hunt large animals().
A.True
B.False
C.Not Mentioned
9.The passage is mainly about().
A.parts of the brain that store information
B.illness that results in serious memory loss
C.how human brains process, store and recall information
D.how to improve our memory
10.What do you think “ginseng and gingko” probably are()？
A.Plants
B.Animals
C.Food
D.Drinks
11.Halloween happened().
A.from October 31st to November 1st
B.on October 31st
C.on November 1st
D.between October 31st and November 1st
12. How many cultural differences does the author mention in the text()？
A.One
B.Two
C.Three
D.Four
第8题
A.were
B.weren ’t
C.used
D.didn ’t
第9题
A.when
B.as
C.while
D.since
