问题 问答题

某大型桥梁工程,主跨为50m预应力钢筋混凝土简支T形梁,T梁施工采用预制吊袋,预应力采用后张法施工。
施工单位项目部对该工程施工现场的生产要素管理作了详细的安排。施工的组织形式采取矩阵式管理组织形式。施工中所使用的钢材为预应力钢绞线。
为了达到提高机械作业的生产率,降低机械运转费用和延长机械使用的寿命,在组织机械化施工时,特别注重了系列机械的组合。
在桥梁基础灌注桩施工过程中,施工单位针对施工现场的地质条件为卵石和漂石,所以采用液压旋挖钻孔机进行钻孔施工。
[问题]

桥梁工程中选择施工机械的一般原则是什么

答案

参考答案:公路工程中施工机械选择的一般原则是适应性、先进性、通用性和专用性。

阅读理解

阅读理解。

     Almost everyone likes dogs, and almost everyone likes to read about dogs. I have a friend. He has a big

police dog with the name Jack. Police dogs are very clever. Every Sunday afternoon my friend takes Jack

for a long walk in the park. Jack likes these long walks very much.  

     One Sunday afternoon a young man came to visit my friend. He stayed a long time. He talked and talked.

Soon it was time for my friend to take Jack for a walk. But the visitor still stayed. Jack became much worried.

He walked around the room several times and then sat down in front of the visitor and looked at him. But the

visitor paid no attention to Jack. He went on talking. At last Jack got angry. He went out of the room and came

back a few minutes later. He sat down again in front of the visitor, but this time he took the visitor's cap in his

mouth.

1. The young visitor stayed a long time in my friend's house, didn't he? [ ]

A. Yes, he was.

B. Yes, he did.

C. No, he wasn't.

D. No, he didn't.

2. Jack became worried because ______. [ ]

A. he wanted to go out for a walk 

B. he wanted to play with him    

C. he didn't know the young man  

D. he wanted to eat something

3. Jack sat down in front of the visitor because he wanted            . [ ]

A. the visitor to talk with him

B. to join the talk    

C. to show the visitor how clever he was

D. the visitor to leave the house soon

4. The visitor went on talking and ______. [ ]

A. he paid no attention to his cap

B. he didn't like Jack    

C. he paid no attention to Jack

D. he didn't know that his cap was taken away by Jack

5. At last Jack took ______ in his mouth. [ ]

A. food

B. nothing

C. the visitor's cap

D. the visitor's bag

单项选择题 A1/A2型题