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【单选题】
某软件项目的活动图如下所示。图中顶点表示项目里程碑,连接顶点的边表示包含的活动,则里程碑 在关键路径上,活动FG的松弛时间为 20天 。A.
B
B.
C
C.
D
D.
I
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举一反三
【单选题】Three airlines account for most of the air traffic in and out of a local city. If the three airlines joined together in setting fares and air travel schedules, economists would say that they were acti...
A.
monopolistic competitors, as each firm would have to differentiate its airline services from its rivals.
B.
perfect competitors, as each firm would sell travel services at the same fares as the other airlines.
C.
a cartel, as the three airlines together would attempt to coordinate policies in the local market to jointly maximize profits.
D.
none of the above
【单选题】Which of the following is not one of the three major airlines in China?
A.
Sichuan Airlines
B.
Air China
C.
China Southern Airlines
D.
China Eastern Airlines
【单选题】__________ ist der größte Containerhafen in Deutschland.
A.
Der Hamburger Hafen
B.
Der Ludwigshafen
C.
Der Bremerhaven
D.
Der Seehafen Kiel
【判断题】Air China, China Eastern Airlines, China Southern Airlines are the three major airlines in China.
A.
正确
B.
错误
【单选题】Air China, _________, China Southern Airlines arethe three major airlinesin China.
A.
Sichuan Airlines
B.
Hainan Airlines
C.
Xiamen Airlines
D.
China Eastern Airlines
【单选题】When airlines were deregulated in the 1970s, the average price of a ticket was $135. Three decades later, the average price is $275, there are twice as many in-air collisions, fliers in small markets ...
A.
Because of inflation, a $275 ticket today is actually 10 to 20 percent less expensive than a $135 ticket was in 1975.
B.
Deregulation has increased the choices available to fliers in terms of both time of flight and carrier.
C.
Airlines are currently flying more than five times as many passenger miles per year as they did in 1975.
D.
Compared with passengers in large urban areas, passengers in small markets pay, on average, twice as much per mile flown on domestic flights because their airports are generally served by fewer airlines.
E.
Psychologists have been able to determine no connection between the deregulation of the airline industry and the onset of increased levels of air rage.
【判断题】Air China, China Eastern Airlines, China Southern Airlines arethe three major airlinesin China.
A.
正确
B.
错误
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