Economists assume that most people take risks______.
A. because doing so is exciting
B. only when they have no riskless alternative
C. very infrequently
D. if they are compensated for taking the risks
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According to the optimal portfolio theory, where should portfolios lie？______.
A. Under the efficient frontier
B. Above the efficient frontier
C. On the efficient frontier
D. Anywhere, as long as the portfolio is diversified
下列燃气管道，宜采用清管球进行清扫的是()。
A. 球墨铸铁管
B. 长度＜100m钢管
C. 公称直径≥100mm钢管
D. 聚乙稀管
社会主义法制的基本要求是()
A. 法律面前人人平等
B. 有法可依,有法必依,执法必严,违法必究
C. 将社会主义民主制度化、法律化
D. 普及法律教育,增强公民法制意识
银行卡按是否具有透支功能分为贷记卡和借记卡。()
A. 正确
B. 错误
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