单项选择题

What had been the main factor preventing the development of battery buses

A．Their limited range.
B．Their high cost.
C．Their heavy weight.
D．Their loud nois
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单项选择题
Battery buses have some advantages over conventional buses. Which of these advantages is not mentioned in the passage
A．They use less fuel.
B．They make less noise.
C．They produce less pollution.
D．They cost less to produc
单项选择题
The two houses were not ______.
A．of the same style
B．designed by the same designer
C．the same looking from the outside
D．the same looking from the inside
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