某工程双代号网络计划如下图所示，其关键线路有（）条。 A．1 B．2 C．3 D．4
题型：单项选择题
问题：
某工程双代号网络计划如下图所示，其关键线路有（）条。
A．1
B．2
C．3
D．4
题型：单项选择题
| 完形填空。 | ||||
| Red roses were her favorites, her names was also Rose. And every year her husband sent them, tied with pretty bows. The year he died, the roses were still 1 to her door. Each year he sent her roses, and the 2 would always say, "I love you even more this year, than last year on this day." My love for you will always 3 , with every passing year. "She knew this was the last time 4 the rose would appear. Her loving husband did not know that he would 5 . he always liked to do things early. Then, if he got too busy, 6 would work out fine." A year went by, and it was 7 to live without her mate. Then, the very hour, as on Valentines before, the doorbell rang, and there were roses, sitting by her door. She brought the roses 8 , calling the florist shop. The owner answered, and she asked him , if he would explain, why would someone do this to her, 9 her such pain? "I know your husband passed away, more than a year ago," The owner said, "I knew you'd 10 , and you would want to know. " " The flowers you received today, were 11 in advance." "You husband always planned ahead, he left nothing to chance." She thanked him and 12 the phone, her tears now flowing hard. Her fingers shaking, as she slowly reached to 13 the card. Inside the card, she saw that he had written her a note. This is what he wrote: "Hello my love, I know it's been a ye  ar 14 I've been gone, I hope it hasn't been too hardfor you to overcome." "I know it must be lonely, and the pain is very 15 . for if it was the other way, I know how I would feel. The love we shared 16 everything so beautiful in life. I loved you more than words can say." "You were my friend and lover, I know it's only been a year, 17 please try not to grieve. I want you to be happy, 18 when you shed your tears. That is why the roses will be sent to you for years." "When you get these 19 , think of all the 20 that we had together, and how both of us were blessed. I have always loved you and I know I always will. My love, you must go on, you have some living still." | ||||
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