当收益率曲线有正的斜率、并且预计收益率曲线不变时，短期债券的收益率比长期债券的收益率高。（ ）
参考答案：错
Sally took a photo of her friends while they_____computer games.
A．play
B．are playing
C．have played
D．were playing
中国特色社会主义的共同理想就是中 * * 党人的最高理想。( )
