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【简答题】
某机电安装工程公司承接某汽车厂重型压力机车间机电设备安装工程,工程内容包括:设备监造,压机的就位安装、压力管道安装、电气工程、自动控制工程和单机试运行等。其中压机最高22.5m,单件最重为105吨。合同工期为4个月。合同约定,工期每推迟一天罚10000元,提前一天奖励5000元。 对压力管道的安装,机电安装工程公司项目部在安装前按规定履行了书面告知手续。 该公司项目部对承接工程进行分析,工程重点是压机吊装就位,为此,制定了两套吊装方案: 第一套方案:采用桅杆式起重机吊装。经测算施工时间需要50天,劳动力安排日平均为30人,参照相关规定计算人工日平均工资50元,机械台班费及新购置钢丝绳和索具费用共20万元,其他费用2.5万元。 第二套方案:采用两台1OO吨履带式起重机抬吊。吊车需要租赁,租赁费用1万元/台班,但不发生购置钢丝绳和索具其他机械台班费。经测算,现场共需14天,与第一套方案相比人工降低70%,其他费用可降低30%。该项目部合理选择了吊装方案,注重安全管理,合理调度,加强了施工阶段的成本控制,尤其对压机吊装成本费用的控制。吊装部队发挥了积极性,如期完成任务,为后面工序创造了良好条件,使该工程项目提前8天完成了施工任务。 对压机两套吊装方案进行技术、经济、安全等综合分析,该项目部哪套方案?为什么?
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参考答案:
举一反三
【多选题】设f(x)在[a,b]上连续,则下列式子成立的有(    ).
A.
B.
C.
【单选题】热固性塑料的特点是固化()。
A.
一次
B.
二次
C.
多次
【单选题】What is the main problem?
A.
He doesn't know what color his friend likes in a gift.
B.
His friend has a broken knapsack.
C.
The gift he wants isn't there.
D.
He doesn't know what his friend will find useful in a gift.
【单选题】In the ________ of the race between the tortoise and the hare, the tortoise wins, even though he is slow, because he keeps going with determination.
A.
fable
B.
tale
C.
story
D.
saga
【判断题】T he tortoise is friendly. ( )
A.
正确
B.
错误
【单选题】若运行时为变量x输入12,则以下程序的运行结果是#includevoidmain(){intx,y;scanf("%d",&x);y=x>12?x+10:x-12;printf("%d\n",y);return0;}
A.
4
B.
3
C.
22
D.
0
【单选题】In the race between the hare and the tortoise, the tortoise ______.
A.
won the final laugh
B.
had the final laugh
C.
got the last laugh
D.
made the last laugh
【简答题】Mark Twain was an American writer.One day he went to a city by train.He wanted to see one of his friends there.He was a very busy man.He usually forgot something.When he was in the train, the conducto...
【简答题】阅读理解。 The Blacks are American tourists. They visit in Beijing now. This is their first visit to China. They are going to stay  in China for three months. They want to visit some big cities and village...
【单选题】When he heard the _______ news that an earthquake occurred in Sichuan, he felt very___________.
A.
frightened; frightened
B.
frightened; frightening
C.
frightening; frightening
D.
frightening; frightened
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