列车实行制动后不再进行缓解，根据列车减速情况进行追加减压，即可使列车停于预定地点，叫做（）.
参考答案：一段制动法
— There used to be lots of fish in the lake.
— Yes, but there are very __________ now.
A．few
B．fewer
C．little
D．less
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