【单选题】A monopolistically competitive firm has excess capacity in the long run. This means that it:
A.
produces less than the output at which average total costs are minimized.
B.
produces less than the output at which price and marginal cost are equal.
C.
could produce more by moving to a larger plant.
D.
doesn't maximize profits.
【简答题】Two vectors are defined to be equal if they have the same magnitude and the same dirction. Graphically, this means that they have the same length and are parallel to each other.A consequence of the de...
【单选题】But even here in Paris ________ signs of economic crisis have emerged. [ ]
【单选题】In the writer's opinion, interdisciplinary studies are important because they ______.
A.
encourage scholars to concentrate on their own specialisations
B.
allow scholars to change disciplines more easily
C.
make scholars aware of problems outside their own field
D.
allow overworked scholars to relax
【单选题】As it is used in the second paragraph of the passage, the word 'migrant' means______.
A.
of visiting as a tourist
B.
of moving officially from one place, job, thing, etc. to another
C.
of moving from one place to another changing one's place of living, esp. for a limited period
D.
of going from place to place, esp. to a long distant place making a journey
【简答题】阅读理解。 Hotlines have become common in China. Some radio broadcasting stations use hotlines to encourage the listeners to take part in the talk show. Are you interested in hotline? That's a good idea. Y...
【简答题】阅读理解。 Hotlines have become common in China. Some radio broadcasting stations use hotlines to encourage the listeners to take part in the talk shows. That's a good idea. Yet, the fact is some people do...
【单选题】by the advances in technology, many farmers have set up farms on their land.