【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. [ ]
【简答题】病人张某、48岁,企业老总,因工作需要经常加班熬夜,在外应酬,喜食油腻的高蛋白、高脂肪食物,并大量吸烟、饮酒,近来发现体重迅速增加,体力和精力降低。
【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
【单选题】桩基础一般由设置于岩土中的桩和联接于桩顶端的()组成。
【单选题】关于早产儿特点,下列哪项是错误的
E.
水需要量相对大,每天约120~150ml/kg
【单选题】by the advances in technology, many farmers have set up farms on their land.