衡量股票投资收益水平的指标主要有（）。
A.股利收益率
B.持有期收益率
C.直接收益率
D.股份变动后持有期收益率
参考答案：A, B, D
_____ the city’s public school system should be open to the children of migrant workers has become the focus of discussion.
A．Whether
B．What
C．That
D．If
简述影响菜肴质感的因素有哪些？
