投资活动所取得的成果与所占用或消耗的投资之间的对比关系是指( )。
A．投资利润B．投资收益C．投资回报D．投资效益
参考答案：D
---- What has made him look like lacking sleep?
----- _____ his wife is ill and he has to get up several times a night to attend to her.
A．For
B．Because
C．That
D．What
肤色暗黄要选用（）修饰色。
A、紫色
B、黄色
C、绿色
D、蓝色
