问题
单项选择题
工程项目进度管理中，工作定义的依据不包括( )。
A．历史资料
B．成果说明文件
C．项目范围说明书
D．工作分解结构
答案
参考答案：B
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工程项目进度管理中，工作定义的依据不包括( )。
A．历史资料
B．成果说明文件
C．项目范围说明书
D．工作分解结构
参考答案：B
The bicycle is one of the simplest yet most useful inventions in the world. What is most surprising is that it was not ___1__ earlier, although the great inventor Leonardo Da Vinci had drawn pictures for bicycles and also for flying machines and some other things. Those things were not produced___2___ long after he died. A person riding a bicycle uses ___3___ energy to make the bicycle move, and there is no pollution at all when you are riding. Even so, in developed ____4___, most people don’t travel to work by bicycle. It is not because the bicycles are expensive or people feel___5____ if they ride to work. It’s because __6___ cars on the roads becomes larger. It certainly becomes ___7___ to ride a bicycle. As a result, more people put their bicycles away and go to work ___8___ their cars , and in this way, the situation is made more serious.___9___ the best way to make riding safer and more popular is to create paths (开设通道) only for bicycles, and to make ___10___ so difficult and expensive for drivers to take their cars into the city that they will go back to use their bicycles.
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