Choose the correct words to complete the sentences. Prior to the 20th century, many languages with small numbers of speakers survived for centuries. The increasingly interconnected modern world makes it uch more difficult for small language communities to live in relative isolation,a key factor in language ____.
It’s better to give an example in an introductory paragraph.
____ I known that we would be walking the fifteen blocks, I would have worn more comfortable shoes.
Choose the best statement that serves in an opening paragraph in an essay on reducing pollution.
Sentence② offers an example to prove the main point.① Curiosity motivates s to uncover the truth about nature and life. ②It akes a curious mind to look beneath the surface and discover new worlds and possibilities. ③Were it not for curiosity, Newton would never have developed the law of gravitation nor would the continents of America or Australia be discovered.
Choose the right translation of the following proverbs.锲而不舍，金石可镂。
Sentence A is the correct pattern for “不可否认的是…”A) There s no denying that…B) No one can refuse that…
Which of the following products would be considered scarce?
Water is necessary for life. Is the marginal benefit of a glass of water large or small?
In most societies, resources are allocated by
Assume a market is perfectly competitive. When a new producer enters the market, the
The property of society getting the most it can from its scarce resources is called
The two words most often used by economists are
The word “economy” comes from the Greek word oikonomos, which means
Which of the following would most likely serve as an example of a monopoly?
Your opportunity cost of going to a movie is
High-school athletes who skip college to become professional athletes
Give three examples of important tradeoffs that you face in your life.
When computing the opportunity cost of attending a basketball game you should include
Which of the following is an example of a less-than-highly-organized market?
The English word that comes from the Greek word for "one who manages a household" is
期初年金与期末年金存在以下关系： 期初年金的现值或终值 =期末年金的现值或终值×（1+r）
Economics is the study of
For most students, the earnings they give up to attend college are
A society allocates its scarce resources to various jobs. These scarce resources include
Economics is best defined as the study of
Why isn’t trade among countries like a game with some winners and some losers?
The highest form of competition is called
An increase in the price of a good will
The term price takers refers to buyers and sellers in
When the government implements programs such as progressive income tax rates, which of the following is likely to occur?
In a competitive market, the price of a product
Assume Diana buys computers in a competitive market. It follows that
Adam Smith’s “invisible hand” refers to
A monopoly is a market with one
You have driven 800 miles on a vacation and then you notice that you are only 15 miles from an attraction you hadn’t known about, but would really like to see. In computing the opportunity cost of visiting this attraction you had not planned to visit, you should include
Demand is elastic if the price elasticity of demand is
The price elasticity of demand measures how much
If the quantity demanded of a certain good responds only slightly to a change in the price of the good, then the