单项选择题 听力原文：W: Did you go to the meeting last night?M: I would have gone if I hadn't had a headache.What does the man mean?A．He didn't like the meeting.B．He had a headache.C．He didn't have a headache.D．He would go to the meeting.

单项选择题 根据《房屋建筑与装饰工程工程量计算规范》，挖一般土方的工程量按设计图示尺寸以体积计算，挖土方平均厚度应按（）。

单项选择题 不属于短期政府债券的特征的一项是( )。