问题 问答题


(一)
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形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做了详细的安排。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,针对施工现场的地质条件为卵石和漂石,施工单位采用液压旋挖钻孔机进行钻孔施工。
问题:

合理选择桥梁工程施工机械的依据是什么

答案

参考答案:

解析:合理选择施工机械的依据是工程量、施工进度计划、施工质量要求、施工条件、现有机械的技术状况和新机械的供应情况等。

阅读理解

A man living absolutely alone in a desert or forest is free from other people; but he is not absolutely free. His freedom is limited in several ways. Firstly, by the things around him, such as wild animals or cliffs. Secondly, by his own needs: he must have sleep, water, food and shelter from extreme heat or cold. Lastly, by his own nature as a man: disease may attack him, and death will certainly come to him sooner or later.

On the other hand, when men become organized into very large groups and civilization develops, it is possible to get freedom from hunger, thirst, cold, heat, and many diseases, so that each person can live a happier life than he could if he were living alone; but such a society can not work successfully unless the freedom of each human being is to some extent limited so that he is kept from hurting others. I am not free to kill others, nor to steal someone else’s property , nor to act in a way that does wrong against the moral sense of the society in which we live. I have to limit my own freedom myself so that others will not limit it too much: I agree to respect the rights of others, and in return they agree to respect mine.

The advantages of such an agreement are great: one can become a doctor knowing that others will grow food, make clothes and build a house for him, in return for the work he does to keep them healthy. If each man had to grow his own food, make his own clothes, build his own house and learn to be his own doctor, he would find it impossible to do any one of these jobs really well. By working together, we make it possible for society to provide us all with food , clothes, shelter and medical care, while leaving each of us with as much freedom as it can.

64. A man living alone in a desert or forest       .

A. is absolutely free              B. feels happy

C . has limited freedom               D. enjoys no freedom

65. According to the writer, he limits his freedom because       .

A. hunger, thirst and disease limit him             B. others won’t limit theirs

C . the moral sense of the society limits him       D. others will respect his

66. The author suggests that when men live together         .

A. they have a safer and easier life             B. they are not free at all

C . they must build shelters for others          D. they can get more protection

67.This text is written mainly to show that        .

A. one can have all his freedom by living on his own

B. one has limited freedom just because of his own nature

C . one must fight for his freedom if he’s free from other people

D. one will have much freedom by working together with others

单项选择题