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【简答题】
某中学举行数学知识竞赛，所有参赛学生分别设有一、二、三等奖和纪念奖，获奖情况已汇制成如图所示的两幅不完整的统计图，根据图中所给信息解答下列问题： （1）这次数学知识竞赛获得二等奖人数是多少？ （2）请将条形统计图补充完整； （3）若给所有参赛学生每人发一张卡片，各自写自己名字，然后把卡片放入一个不透明的袋子内，摇匀后任意摸取一张卡片，求摸出的卡片上是写有一等奖学生名字的概率。
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皮皮学刷刷变学霸
举一反三
【单选题】In the HO model, the production possibility frontier is bowed out due to the assumption of
A.
identical tastes.
B.
different factor intensities in the production of the two goods.
C.
increasing returns to scale.
D.
Two of the above.
【简答题】( )是高钾血症最主要的原因。
【单选题】The assumption of increasing opportunity costs in the HO model increases the likelihood that
A.
there will be incomplete specialization in production after trade begins.
B.
countries will be better off with free international trade.
C.
countries will maximize their standards of living from free international trade.
D.
All of the above.
【单选题】The HO model rules out the classical model's basis for trade by assuming that ________ is (are) identical between countries.
A.
factor endowments
B.
factor intensities
C.
technology
D.
opportunity costs
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