一般而言，连续三年净资产收益率超过10%的股票属于绩优股。（）
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某投资者1月1日购买了1000股长江电力股票，买入价格为6.50元/股，6月30日将股票全部卖出，价格为7.10元/股，期间每股分红0.20元。则投资者投资该股票的年回报率约为（）。
A. 0.1231
B. 0.2462
C. 0.2613
D. 0.1931
根据中华人民共和国国家统计局的数据显示，2005年9月全国居民消费价格指数(CPI)为100.9，则9月中国的货币购买力指数是（）。
A. 9.9108×10-3
B. 1.009×10-3
C. 100.9
D. 9.9108
Which of the following is NOT true according to the passage？
A. the division of sex-defined roles is completely unacceptable.
B. women's roles in work are too limited at present.
C. in one society, men might perform. what is considered women's duties.
D. some of the women's roles in domestic duties cannot be taken over by men.
According to the author, sex roles ______.
A. are socially determined
B. are emotionally and physically determined
C. can only be determined by what education people take
D. are biologically and psychologically determined
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