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举一反三
【单选题】The concept of "environment" is certainly difficult and may even be misunderstood; but we have no handy substitute . It seems simple enough to distinguish between the organism(有机体) and the surrounding...
A.
it develops side by side with environmental factors.
B.
it is also affected by environmental factors
C.
it is generally accepted to be part of the environment
D.
it is a product of man"s biological instincts