针对全局范围内具有政策性的重要事项作出决断，并要求贯彻实施的决定称为( )A．安排

A recent study, published in last week’s Journal of the American Medical Association, offers a picture of how risky(冒险的) it is to get a lift from a teenage driver. Indeed, a 16-year-old driver with three or more passengers is three times as likely to have a deadly accident as a teenager driving alone, while the risk of death for drivers between 30 and 59 decreases with each additional passenger.

The authors also found that the death rates for teenage drivers increased sharply after 10 p.m., and especially after midnight. With passengers in the car, the driver was even more likely to die in a late-night accident.

Robert Foss, a scientist at the University of North Carolina Highway Safety Research Center, says the higher death rates for teenage drivers have less to do with “really stupid behavior” than with just a lack of driving experience. “The basic issue,” he says, “is that adults who are responsible for issuing licenses fail to recognize how complex and skilled a task driving is.”

Both he and the author of the study believe that the way to mitigate (使……缓解)the problem is to have states set up so-called graduated licensing systems, in which getting a license is a multistage process. A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult, followed by a period of driving with night or passenger limits, before graduating to full driving licenses.

Graduated licensing systems have reduced teenage driver crashes, according to recent studies. About half of the states now have some sort of graduated licensing system in place, but only 10 of those states have limits on passengers. California is the strictest, with a new driver under 20 forbidden to carry any passenger (without the presence of an adult over 25) for the first six months.

小题1:Which of the following situations can we infer is most dangerous according to the passage?

A．A teenager driving after midnight with passengers in the car.

B．Adults giving a lift to teenagers on the highway after 10 p.m.

C．Adults driving with three or more teenage passengers late at night.

D．A teenager getting a lift from a stranger on the highway at midnight.小题2:According to Robert Foss, the high death rate of teenage drivers is mainly because of _______.  

A．their frequent driving at night

B．their improper ways of driving

C．their driving with passengers

D．their lack of driving experience小题3:According to Paragraph 3, which of the following statements is TRUE?

A．The licensing departments are partly responsible for teenagers' driving accidents.

B．Driving is too complex a skill for teenagers to learn.

C．Teenagers should be forbidden to apply to take driving lessons.

D．Teenagers should spend more time learning to drive.小题4:A suggested measure to be taken to reduce teenagers' driving accidents is that_______.

A．driving in the presence of an adult should be made a rule

B．the licensing system should be improved

C．they should not be allowed to drive after 10 p.m.

D．they should be forbidden to take on passengers

土的液塑限联合测定试验，若三点不在一条直线上，则该试验作废。( )

关于溶血性黄疸叙述正确的是（）

A.溶血时红细胞破坏过多就会出现黄疸

B.溶血性黄疸与肝代谢无关

C.溶血性黄疸是间接胆红素升高所致

D.溶血性黄疸时尿胆原减少

E.原位溶血不出现溶血性黄疸

在OSI参考模型中，数据链路层处理的数据单位是（）。

A．比特

B．帧

C．分组

D．报文

工程质量缺陷和事故

某实施监理的住宅楼是一幢地上6层、地下1层的砖混结构住宅，总建筑面积3200m2。在现浇顶层一间屋面的混凝土施工过程中出现坍塌事故，坍塌物将与之垂直对应的下面各层预应力空心板砸穿，10名施工人员与4辆手推车、模板及支架、混凝土一起落入地下室，造成2人死亡、3人重伤、经济损失达26万元人民币的事故。从施工事故现场调查得知，屋面现浇混凝土模板采用300mmX1200mmX55mm和300mm×1500mmX55mm定型钢模，分三段支撑在乎放的50mmX100mm方木龙骨上，龙骨下为间距800mm均匀支撑的4根直径100mm圆木立杆，这4根圆木立杆顺向支撑在作为第6层楼面的3块独立的预应力空心板上，并且这些预应力空心板的板缝用混凝土浇筑仅4天，其下面也没有任何支撑措施，从而造成这些预应力空心板超载。施工单位未对模板支撑系统进行计算也无施工方案，监理方也未提出异议，便允许施工单位进行施工。出事故时监理人员未在场。

对于本次事故，可以认定为几级重大事故？依据是什么？