单项选择题

Which of the following countries is the locality of the R.E.R. system

A．England.
B．The United States.
C．Germany.
D．France.
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单项选择题
Which of the following is NOT true of the public transportation systems in the developed countries
A．In the U. S. , commuter railroad service, trolleys and buses have been reduced.
B．Subways have largely been maintained.
C．Fares usually could not cover operating costs.
D．U.S. public officials think it worthwhile to subsidize public transportation.
单项选择题
It can be inferred from the passage that before 1910 the normal running time of a film was probably ______.
A．15 minutes or less
B．between 15 and 30 minutes
C．between 30 and 45 minutes
D．1 hour or more
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