非市场赢利原则是公共财政的（）。
A.前提条件
B.本质要求
C.核心内容
D.立足点
参考答案：D
妹妹的身高大约1米96厘米。[ ]
It was not until near the end of the letter ______ she mentioned her own plan.
A．where
B．that
C．why
D．when
