【单选题】"Mrs. Wright, can you give me a little extra help typing some letters today?" "Sorry, I can't. The boss has an urgent report for me to write. She demanded that it _______ on her desk by 5 p.m. Today."
【简答题】设函数 ,则间断点 是第____类的____间断点
【单选题】_____ for his mistake, the little boy could not but _____to his teacher that he was wrong.
D.
To be blamed; admitting
【判断题】成本效益分析的目的是从经济角度来评价一个新的软件项目是否可行。