由于标准差或方差指标衡量的是风险的绝对大小，因而不适用于比较不同的预期收益率的投资的风险。
参考答案：对
Tigers ____and killed at such a speed that they will disappear from the earth in near future. [ ]
A. hunted
B. are hunted
C. are being hunted
D. had been hunted
某段DNA的编码链的碱基顺序为：5'-ACTAGCCTG-3'，转录的RNA的相应碱基顺序为
A．5'-ACTAGCCTG-3'B．5'-ACUAGCCUG-3'C．5'-CAGGCTAGT-3'D．5'-CAGGCUAGU-3'E．5'-UGAUCGGAC-3'
