当电力系统受到较大干扰而发生（）时，为防止整个系统的稳定被破坏，经过一段时间或超过规
题型：单项选择题
问题：
当电力系统受到较大干扰而发生（）时，为防止整个系统的稳定被破坏，经过一段时间或超过规定的振荡周期数后，在预定地点将系统进行解列，该执行振荡解列的自动装置称为振荡解列装置。
A、振荡
B、同步振荡
C、非同步振荡
D、低频低压
题型：单项选择题
E
A century ago in the United States, when an individual brought suit against a company, public opinion tended to protect th
at company. But perhaps this phenomenon was most striking in the case of the railroads. Nearly half of all negligence cases decided through 1896 involved railroads. And the railroads usually won.
Most of the cases were decided in sate courts, when the railroads had the climate of the times on their sides. Government supported the railroad industry; the progress railroads represented was not to be slowed down by requiring them often to pay damages to those unlucky enough to be hurt working for them.
Court decisions always went against railroad workers. A Mr. Farwell, an engineer, lost his right hand when a switchman’s negligence ran his engine off the track. The court reasoned that since Farwell had taken the job of an engineer voluntarily at good pay, he had accepted the risk. Therefore the accident, though avoidable had the switchmen acted carefully, was a “pure accident”. In effect a railroad could never be held responsible for injury to one employee caused by the mistake of another.
In one case where a Pennsylvania Railroad worker had started a fire at a warehouse and the fire had spread several blocks, causing widespread damage, a jury found the company responsible for all the damage. But the court overturned the jury’s decision because it argued that the railroad’s negligence was the immediate cause of damage only to the nearest buildings. Beyond them the connection was too remote to consider.
As the century wore on, public sentiment began to turn against the railroads—against their economic and political power and high fares as well as against their callousness toward individuals.
72. Which of the following is NOT true in Farwell’s case?
A. Farwell was injured because he negligently ran his engine off the track.
B. Farwell would not have been injured if the switchman had been more careful.
C. The court argued that the victim had accepted the risk since he had willingly taken his job.
D. The court decided that the railroad should not be held responsible.
73. What must have happened after the fire case was settled in court?
A. The railroad compensated for the damage to the immediate buildings.
B. The railroad compensated for all the damage by the fire.
C. The railroad paid nothing for the damaged building.
D. The railroad worker paid for the property damage himself.
74. The following aroused public resentment EXCEPT _____.
A. political power B. high fares C. economic loss D. indifference
75. What does the passage mainly discuss?
A. Railroad oppressing individuals in the US.
B. History of the US railroads.
C. Railroad workers’ working rights.
D. Law cases concerning the railroads.