请根据以上资料，选择以下栏目的正确选项：“经营单位”栏：（）。 A．天津保税区报关实

网络协议

阅读理解。

     Many Chinese have been greatly shocked by the traffic accident caused by the drunk driver Sun

Weiming, who has killed five and injured some others in Chengdu, Sichuan. However, such a case is not

rare.    

     Today, traffic accidents may have been regarded as a social problem. The car has killed and disabled more people in its brief history than any bomb or weapon ever invented. Much of the blood on the street

flows actually from rude behavior of drivers who refuse to respect the legal and moral rights of others. In

fact, the enemies of society on wheels are rather harmless but just ordinary people acting carelessly, you

might say. But it is a principle both of law and common morality that carelessness is no excuse when one's actions could bring death or damage to others. A minority of the killers go even far beyond carelessness

that can be imagined.    

     Researchers have estimated that as many as 80 percent of all automobile accidents can be attributed to the psychological condition of the driver. Emotional upsets can change drivers' reactions, slow their

judgment, and make them blind to the dangers that might otherwise be evident. The experts warn that it is

vital for every driver to make a conscious effort to keep his/her emotions under control.    

     Yet the irresponsibility that accounts for much of the problem isn't only put upon drivers. Street walkers regularly ignore or break traffic regulations. They are blamed in most vehiclewalker accidents, and many

cyclists even believe that they are not subject to the basic rules of the road.    

     Significant legal advances have been made towards safer driving in the past few years. Safety standards for vehicles have been raised both at the point of manufacture and through regular road inspections. In

addition, speed limits have been lowered. Due to these measures, the accident rate has decreased. But the accident experts still worry because there has been little or no improvement in the way drivers behave. The only real and lasting solution, say the experts, is to make people believe that driving is a skilled task

requiring constant care and concentration. Those who fail to do all these things present a threat to those

with whom they share the road.

1. Traffic accidents may be regarded as a social problem because _____.  

A. auto driving has become dangerous and harmful in today's society  

B. people usually pay no attention to law and morality when driving  

C. they have caused serious psychological problems among drivers  

D. the car has killed and disabled more people than any weapon in history

2. Who are NOT mentioned to be responsible for the road accidents in the passage?  

A. Careless bicycleriders.  

B. Careless people walking in the street.  

C. Irresponsible auto drivers.  

D. Irresponsible auto manufacturers.

3. By discussing solutions to traffic accidents,  the author seems to be _____.

A. doubtful and hopeless  

B. angry and disappointed

C. objective and concerned

D. anxious and annoyed

4. The author writes this passage to _____.  

A. show his worries about drunk driving  

B. help protect street walkers from car accidents  

C. discuss traffic problems and possible solutions  

D. warn auto drivers to refuse drunk driving

减压病

无梁楼板，柱网尺寸为7.5m×7.5m，板厚200mm，中柱截面尺寸为600mm×600mm，安全等级二级，环境类别为一类。

上题中，若仅采用弯起钢筋（采用HRB335级）作受冲切钢筋时所需的弯起钢筋截面面积A_sbu=（）mm²。

A．1720.9

B．1947.3

C．2266.1

D．2434.1

对联是我国特有的一种文化艺术形式，它以群众喜闻乐见的方式反映着重大的历史事件或人物。以下对联刻画的对象是唐朝诗人杜甫的是（）

A.刚直不阿，留得正气凌宵汉；幽而发愤，著成信使照尘寰

B.青山有幸埋忠骨，白铁无辜铸佞臣

C.诗史数千言，秋天一鹄先生骨；草堂三五里，春水群鸥野老心

D.写鬼写妖高人一筹，刺贪刺虐入木三分