在一张长18厘米，宽12厘米的长方形纸片上剪一个最大的正方形，剪去的纸片面积是□平方厘米。 □内应填[ ]
A．216
B．144
C．72
答案：C
经期吐血、衄血，量少，色黯红，平时手足心热，潮热咳嗽，其辨证为：
A．阴虚火旺
B．肝阳上亢
C．肺肾阴虚
D．肝肾阴虚
E．阴虚肝旺
Nothing can stop a _____ student _____ his mind to give up his studies. [ ]
A. promised; to change
B. promised; changing
C. promising; changing
D. promising; to change
