问题 选择题

如果圆x2+y2+Gx+Ey+F=0与x轴相切于原点,那么(  )

A.F=0,G≠0,E≠0

B.E=0,F=0,G≠0

C.G=0,F=0,E≠0

D.G=0,E=0,F≠0

答案

圆与x轴相切于原点,则圆心在y轴上,G=0,圆心的纵坐标的绝对值等于半径,F=0,E≠0.

故选C.

阅读理解

I was walking along the main street of a small seaside town in the north of England looking for somewhere to make a phone call. My car had broken down outside the town and I wanted to contact the AA Company. Low grey clouds were gathering across the sky and there was a cold damp wind blowing off the sea which nearly threw me off my feet every time I crossed one of the side streets. It had rained in the night and water was dripping from the bare trees that lined the street. I was glad that I was wearing a thick coat.

There was no sign of a call box, nor was there anyone at that early hour whom I could ask. I had thought I might find a shop open selling the Sunday papers or a milkman doing his rounds, but the town was completely dead. The only living thing I saw was a thin frightened cat outside a small restaurant.

Then suddenly I found what I was looking for. There was a small post office, and almost hidden from sight in a dark narrow street. Next to it was the town’s only public call box, which badly needed a coat of paint. I hurried forward, but stopped in astonishment when I saw through the dirty glass that there was a man inside. He was fat, and was wearing a cheap blue plastic raincoat. I could not see his face and he didn’t raise his head at the sound of my footsteps.

Carefully, I remained standing a few feet away and lit a cigarette to wait for my turn. It was when I threw the dead match on the ground that I noticed something bright red trickling from under the box call door

小题1: At what time was the story set?

A.An early winter morning

B.A cold winter afternoon

C.An early summer morning

D.A windy summer afternoon小题2: Which of the following words best describe the writer’s impression of the town?

A.cold and frightening

B.dirty and crowded

C.empty and dead

D.unusual and unpleasant小题3: The underlined word “ trickling” in the last paragraph means_______________

A.rushing out suddenly

B.shining brightly

C.flowing slowly in drops

D.appearing slowly小题4: Why didn’t the man raise his head when the writer came near?

A.He was annoyed at being seen by the writer.

B.He was angry at being disturbed by the writer.

C.He was probably fast asleep.

D.He was probably murdered.

问答题

某工程项目,业主通过招标与甲建筑公司签订了土建工程施工合同,包括A、B、C、D、E、 F、G、H八项工作,合同工期360天。业主与乙安装公司签订了设备安装施工合同,包括设备安装与调试工作,合同工期180天。通过相互的协调,编制了如图2—1所示的网络进度计划:

该工程施工过程中发生了以下事件:

事件1:基础工程施工时,业主负责供应的钢筋混凝土预制桩供应不及时,使A工作延误7天。

事件2:B工作施工后进行检查验收时,发现一预埋件埋置位置有误,经核查,是由于设计图纸中预埋件位置标注错误所致。甲建筑公司进行了返工处理,损失5万元,且使B工作延误15天。

事件3:甲建筑公司因人员与机械调配问题造成C工作增加工作时间5天,窝工损失,2万元。

事件4:乙安装公司设备安装时,因接线错误造成设备损坏,使乙安装公司安装调试工作延误5天,损失12万元。

发生以上事件后,施工单位均及时向业主提出了索赔要求。

[问题]1.施工单位对以上各事件提出索赔要求,分析业主是否应给予甲建筑公司和乙安装公司工期和费用补偿。

2.如果合同中约定,由于业主原因造成延期开工或工期延期,每延期一天补偿施工单位6000元,由于施工单位原因造成延期开工或工期延误,每延误一天罚款6000元。计算施工单位应得的工期与费用补偿各是多少。

3.该项目采用预制钢筋混凝土桩基础,共有800根桩,桩长9m。合同规定:桩基分项工程的综合单价为180元/m;预制桩由业主购买供应,每根桩按950元计。计算甲建筑公司桩基础施工应得的工程款是多少(注:计算结果保留一位小数。)