护士对患者说，“根据我的理解，您刚才的意思是想请王院长再给您复诊一次，是这个意思吗”

下列诊断肺隔离症最有价值的X线方法是（）

A.支气管造影

B.主动脉造影

C.体层摄影

D.胸部平片

E.肺动脉造影

下列说法正确的是          (　 　)

A．Na的结构示意图

B．多电子原子中，在离核较远区域运动的电子能量较低

C．非金属元素组成的化合物中可能有共价键和离子键

D．HF、HCl、HBr、HI的热稳定性和还原性依次增强

Believe it or not，optical illusion can cut highway crashes.
Japan is a case in point．It has reduced automobile crashes on some roads by Rearly 75 percent using a simple optical illusion．Butst．ripes,called chevrons(人字形)，painted on ther rads make drivers think that they are driving faster than they really are，and thus drivers slow down.
Now the American Automobile Association Foundation for Traffic Safety in Washington D．C. is planning t。repeat Japan’s success．Starting next year，the foundati。n will paint cheyrons and。ther pattems of stripes on selected roads around the country to test how well the patterns reduce highway erashes．
Excessive(too great)speed plays a major role in as much as one fifth of all fatal traffic accidents， according to the foundation．To help reduce those accidents，the foundation will conduct its tests in areas where speed-related hazards(danger)are the greatest curves，exit slopes，traffic circles，and bridges．
Some studies suggest that straight，horizontal bars painted across roads can initially cut the average speed of drivers in half．However,traffic。ften returns to full speed within months as driVers become used to seeing the painted bars．
Chevrons，scientists say，not only give drivers the impression that they are driving faster than they reallv are but als0 make a lane appear to be narrower．The result is a longer lasting reduction in highway speed and the number of traffic accidents．

The American Automobile Association Foundation for Traffic Safety plans to______

A. try out the Japanese method in certain areas
B. change the road signs across the country
C. replace straight, horizontal bars with chevrons
D. repeat the Japanese road patterns

以下有关城市供电工程规划的表述错误的是( )。

A．电力负荷的计算需考虑工业用电、农业用电、市政用电和居民用电

B．城市电源工程主要有城市电厂和区域变电所等电源设施，城市电厂可以是火电厂、水电厂或地热电厂

C．城市输送电网负责连接城市电源与城市配电网

D．城市配电网可分为高压配电网和低压配电网， 前者提供动力用电，后者提供照明用电

机械经济分析的中心内容是（）。

A.机械产量（或完成台班数）

B.机械使用情况的分析

C.机械使用成本和利润的分析

D.机械经营管理工作的分析