A: have a comparative advantage in both activities.
B: have an absolute advantage in both activities.
C: be more productive per unit of time in both activities.
D: gain from trade with each other.
举一反三
- Christmas celebration includes the activities __________. A: on Christmas eve B: on Christmas day C: on both Christmas eve and Christmas day D: for two weeks
- John and I have just been telling stories two of us. A: ourselves B: to each other C: each of us D: both
- Cotransformation between two genes is more likely if they are: A: close to one another. B: far apart from one another. C: both next to the F factor. D: both oriented in the same direction.
- They have two teams, and ______ have a good chance of winning. A: all B: either C: both D: each
- We note with satisfaction that all these activities have helped to ____ mutual understanding and friendship between our two countries.
内容
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The PR activities are mainly associated to two dimensions. They are:
- 1
Which of the the following statements is true true ? ( ) A: “Two countries can achieve gains from trade even if one of the<br/>countries has an absolute advantage in the production of all goods.” B: “Certain very talented people have a comparative advantage in<br/>everything they do.” C: “If a certain trade is good for one person, it can’t be<br/>good for the other one.” D: “If trade is good for a country, it must be good for everyone in the country.”
- 2
The relationship between tourism and nature is not complicated and many human activities do have good effects on environment, both natural and man-made.
- 3
There are two main categories: external and inte)rnal activities, each of which includes three sub-categories.
- 4
Activity reports and progress reports are similar because they both summarize activities over a specified period. But a(n) __________ report summarizes general activities of a work group over a specified time period.