股票的基本特征包括______。
A．价格稳定性和风险性
B．不可偿还性
C．政策决策性
D．流通性
E．收益性
参考答案：B,C,D,E
炮制熟大黄，应掌握的炮制程度是
A．大黄外部黑色，内部黄褐色B．大黄内外均为褐色C．大黄外部褐色，内部黄色D．大黄内外均为黑色E．大黄炭化
Liu Xiang ________ his experience during the World Track and Field Events when being
interviewed by Reuters.[ ]
A. spoke to
B. referred to
C. contributed to
D. talked to
