接地故障（earth fault）

故障电压（fault voltage）

故障电流（fault current）

基站传输断，在告警管理界面查询到如下告警“E1/T1链路远端接收故障告警（E1/T1 remote receiving fault）”，“PPP链路断告警（PPP Link Broken）”，可能是有哪些原因造成的（）。

A:E1/T1传输线路故障 B:两端的时钟源不同步，时钟基准形成环路等 C:基站侧或BSC侧PPP相关配置错误 D:对端或本端的PPP软件模块异常

客舱增压故障（CABIN PRESS FAULT）灯何时会亮（）

A:自动模式时，系统1故障； B:自动模式时，两个系统都故障； C:人工系统故障。

RAT FAULT（RAT故障）可能的故障为（）

A:RAT未完全收存 B:在RAT收存做动筒上存在压力 C:RAT泵不可用 D:以上都正确

The New Madrid fault is______.

A:a horizontal fault B:a vertical fault C:a more serious fault than the San Andreas fault D:responsible for forming the Mississippi River

The San Andreas fault is ______.

A:an active fault system B:a place where earthquakes have been predicted accurately C:a place where earthquakes have been controlled' D:the location of the Rocky Mountain

Everyone has heard of the San Andreas fault, which constantly threatens California and the West Coast with earth- quakes. But how many people know about the equally serious New Madrid fault in Missouri.’
Between December of 1811 and February of 1812, three major earthquakes occurred, all centered around the town of New Madrid, Missouri, on the Mississippi River. Property damage was severe.
Buildings in the area were almost dest oyed. Whole forests fell at once, and huge cracks opened in the ground, allowing smell of sulfur to filter upward.
The Mississippi River itself completely changed character, developing sudden rapids and whirlpools. Several times it changed its course, and once, according to some observers, it actually appeared to run backwards. Few people were killed in the New Madrid earthquakes, probably simply because few people lived in the area in 1811; but the severity of the earth- quakes are shown by the fact that the shock waves rang bells in church towers in Charleston, South Carolina, on the coast. Buildings shook in New York City, and clocks were stopped in Washington D.C. Scientists now know that America’s two major faults are essentially different. The San Andreas is a horizontal boundary between two major land masses that are slowly moving in opposite directions. California earthquakes result when the movement of these two masses suddenly lurches forward.
The New Madrid fault, on the other hand, is a vertical fault; at some point, possibly hundreds of millions of years ago, rock was pushed up toward the surface, probably by volcanoes under the surface. Suddenly, the volcanoes cooled and the rock collapsed, leaving huge cracks. Even now’, the rock continues to settle downwards, and sudden sinking motions trigger earthquakes in the region. The fault itself, a large crack in this layer of rock, with dozens of other cracks that split off from it, extends from northeast Arkansas through Missouri and into southern Illinois.
Scientists who have studied the New Madrid fault say there have been numerous smaller quakes in the area since 1811; these smaller quakes indicate that larger ones are probably coming, but rite scientists say they have no method of predicting when a large earthquake will occur.
The New Madrid fault is______.

A:a horizontal fault B:a vertical fault C:a more serious fault than the San Andreas fault D:responsible for forming the Mississippi River