财务弹性是用企业的经营现金流量与支付要求进行比较得到反映的，这里的支付要求主要指企业的实际投资需求，可以是投资需求或承诺支付等。( )
参考答案：对
There was something wrong with his ears. He couldn't _____ anything at all. [ ]
A. hear from
B. listen to
C. hear
D. listen
细胞的全能性
