期限不变时，利率越高，现值系数越大。( )
参考答案：错
Her parents _____ her to take some exercise but without result.
Her parents _____ her taking some exercise but without result.
A．suggested
B．persuaded
C．tried to persuade
D．managed to suggest
浮选过程是（）共存的系统。
A、液相
B、固相
C、气相
