问题
单项选择题
关键线路是( )。
A．工作最少的线路
B．在网络计划中只有一条
C．工作最多的线路
D．总持续时间最长的线路
答案
参考答案：D
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关键线路是( )。
A．工作最少的线路
B．在网络计划中只有一条
C．工作最多的线路
D．总持续时间最长的线路
参考答案：D
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| An eight-year-old child heard her parents talking about her little brother. All she knew was that he was very sick and they were 1 . When she heard her dad say to her tearful mother. "Only a miracle (奇迹) can save him now", the little girl hurried to the chemist's (药店) 2 all her pocket money in hand. "What do you want?" asked the chemist. "My little brother is really, really sick and I want to buy a miracle. He has something bad growing inside his head and my daddy says only a miracle can save him." "We don't 3 miracles here, child. I'm sorry." the chemist said, looking 4 at the little girl. In the shop was a well dressed customer. He asked the little girl, "What kind of miracle does your brother 5 ?" "I don't know," she replied. "He's really sick and mommy says he needs a(n) 6 . But my daddy can't 7 it, so I have brought all my pocket money." "How much do you have?" asked the man. "One dollar and eleven cents," she answered quietly. "Well, what a coincidence (巧合)," smiled the man."A dollar and eleven cents the 8 price of a miracle for your little brother." That man was Dr Carlton Armstrong, a doctor. The operation was completed for free and it wasn't long 9 the little brother was home and well again. The little girl was happy. She knew exactly how much the miracle cost…one dollar and eleven cents… plus (加) the 10 of a little child. | ||||
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