更多“2. 一种行为的机会成本是指( )”相关的问题
Technological Utopia for Developing CountriesCyberspace (网络空间), data superhighways, multimedia for those who have seen the future, the linking of computers, television and telephones will change our lives forever. Yet for all the talk of a forthcoming technological Utopia (乌托邦), little attention has been given to the implications of these developments for the poor. As with all new high technology, while the West concerns itself with the "how", the question of "for whom" is put aside once again.Economists are only now realizing the full extent to which the communications revolution has affected the world economy. Information technology allows the extension of trade across geographical and industrial boundaries, and transnational corporations take full advantage of it. Terms of trade exchange, interest rates and money movements are more important than the production of goods. The electronic economy made possible by information technology allows the haves to increase their control on global markets with destructive impact on the have-nots.For them the result is instability. Developing countries which rely on the production of a small range of goods for export are made to feel like small parts in the international economic machine. As "futures" (期货) are traded on computer screens, developing countries simply have less and less control of their destinies.So what are the options for regaining control One alternative is for developing countries to buy in the latest computers and telecommunications themselves—so-called "development communications" modernization. Yet this leads to long-term dependency and perhaps permanent constraints on developing countries" economies.Communications technology is generally exported from the U.S., Europe or Japan; the patents, skills and ability to manufacture remain in the hands of a few industrialized countries. It is also expensive, and imported products and services must therefore be bought on credit—credit usually provided by the very countries whose companies stand to gain.Furthermore, when new technology is introduced there is often too low a level of expertise to exploit it for native development. This means that while local elites, foreign communities and subsidiaries of transnational corporations may benefit, but not developing countries.
A．Because it enables the developed countries to control the international market.B．Because it destroys the economic balance of the poor countries.C．Because it violates the national boundaries of the poor countries.D．Because it inhibits the industrial growth of developing countries.
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根据《烟花爆竹安全级别、类别和标识标注》（GB11/358—2011）规定，爆竹类产品药量标识方法正确的是（）。
A.单发药量：≤0.2g B.单发药量：＜0.2g C.单发药量：0.15g D.单发药量：＞0.2g
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交换机与集线器HUB相比，最大的优点在于（）。
A.交换机便宜
B.交换机不转发广播
C.交换机读取帧的速度比HUB快
D.交换机产生更多的冲突域
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为防范授信风险，客观、准确地掌握押品价值，原则上，对贷后评估报告失效的押品内部评估要求是（）。
A、集中评估 B、即到即评 C、批量评估 D、年底评估
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人车完好标准车轮不得有裂纹，轮缘磨损余量不小于（），踏面磨损余厚不小于（）。
A .
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John was surprised to ______ Matthew at the football game.
A. bump into
B. drop in at
C. come on
D. see off
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顶盖滚边分为几序（）
A.4序
B.3序
C.2序
D.1序
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对高速及城际铁路沿线设置的（）等线路标志应定期检查，确保牢固、可靠。
A.百里标
B.公里标
C.半公里标
D.警冲标
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对服务质量问题的行政处分的种类主要有（）。
A . 通报批评
B . 警告
C . 罚款
D . 降级
E . 开除
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（三）某男，70岁。冠心病史7年。常感胸痛隐隐，神疲乏力，气短懒言，心悸自汗，舌淡黯苔白，脉弱。近日该患者准备外出旅游，担心旅游劳累，途中发病，自行携带上述不宜服用的中成药，并加倍服用该药，结果出现了舌麻感。这是因为该中成药含有毒中药，此药是
A．斑蝥
B．草乌
C．蟾酥
D．生半夏
E．雄黄
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当平行线路因某种原因变成单回路时，电流平衡保护会误动。
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被动，“微阅读”已逐渐对少年儿童形成无法抗拒的多元影响。实际上每种阅读方式都存在同样明显的优势与劣势。“微阅渎”的量永远替代不了深阅读的质量。因此，我们要在少年儿童中倡导多元化阅读方式，教会他们“深读”和“微读”相结合的方法，引导他们按需出发，逐渐走向智慧阅读。 这段文字意在强调( )。
A．“微阅读”对少年儿童形成巨大影响
B．阅读应按需出发，以智慧阅读为宗旨
C．应在少年儿童中倡导多元化阅读方式
D．深阅读对少年儿童有不可替代的价值
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若有定义int x,y；并已正确给变量赋值，则以下选项中与表达式(x－y)?(x＋＋):(y＋＋)中的条件表达式(x－y
若有定义int x,y；并已正确给变量赋值，则以下选项中与表达式(x-y)?(x＋＋):(y＋＋)中的条件表达式(x-y)等价的是______。 A．(x-y＞O) B．(x-y＜O) C．(x-y＜0||x-y＞0) D．(x-y=0)
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