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Organized in 1966 by the Fish and Wildlife Service, the Breeding Bird Survey uses annual roadside counts along established routes for monitoring of population changes of as many as. or of more than 250 bird species, including 180 songbirds. (A) for monitoring of population changes of as many as, or of (B) to monitor population changes of as many, or (C) to monitor changes in the populations of (D) that monitors population changes of (E) that monitors changes in populations of as many as, or 答案C
OG说in order 可省略,任何时候都能省么?? as many as的累赘是从语义上判断去掉的?我不能说正好或多于250只么?
谢谢!! |
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