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【单选题】
A recent study, published in last week's Journal of the American Medical Association, offers a picture of how risky it is to get a lift from a teenage driver. Indeed, a 16-year-old driver with three or more passengern is three times as likely to have a fatal accident as a teenager driving alone. By contrast, 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 dramatically 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 the problem is to have states institute 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 restrictions before graduating to full driving privileges. 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 l0 of those states have restrictions on passengers. California is the stricter, with a novice driver prohibited from carrying any passenger under 20 (without the presence of an adult over 25) for the first six months. Which of the following situations is most dangerous according to the passage?
A.
Adults giving a lift to teenagers on the highway affair 10 p.m.
B.
A teenager driving after midnight with passengers in the car.
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.
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【多选题】当待排序序列基本有序或个数较小的情况下,最佳的内部排序方法是( ),就平均时间而言,( )最佳。
A.
直接插入排序
B.
起泡排序
C.
简单选择排序
D.
快速排序
【单选题】细菌必须借助显微镜才能观察到,常以()作为测量细菌的长度的单位。
A.
nm
B.
mm
C.
um
D.
m
【单选题】细菌个体很小,通常以( )作为测量细菌长度、宽度或直径的单位。
A.
米( m)
B.
毫米( mm)
C.
微米( μm )
D.
纳米( nm)
【判断题】细菌个体很小,其大小通常以厘米为测量其长度、宽度或直径的单位,并以显微测微尺测量其大小。( )
A.
正确
B.
错误
【判断题】非最终灭菌的小容量注射剂生产的灌封工序应在C级背景下的A级洁净区操作。
A.
正确
B.
错误
【单选题】细菌长度的测量单位通常是
A.
厘米
B.
毫米
C.
微米
D.
纳米
【判断题】就平均计算时间而言,快速排序是内排序的最好方法。
A.
正确
B.
错误
【单选题】细菌的长度测量单位是
A.
厘米
B.
毫米
C.
微米
D.
纳米
【单选题】当待排序序列基本有序或个数较小的情况下 , 最佳的内部排序方法 是 ( 直接插入排序 ), 就 平 均时间而言 , ( )最 佳。
A.
直接插入排序
B.
起泡排序
C.
简单选择 排 序
D.
快速排序
【单选题】用于测量细菌长度的单位常用( )。
A.
um
B.
mm
C.
cm
D.
nm
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