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Researchers have found electrical lines are .( )(本题2.5分)
A. blocking condors’ journey home
B. big killers of Califorbnia condors
C. rest places for condors at night
D. used to keep condors away
A. blocking condors’ journey home
B. big killers of Califorbnia condors
C. rest places for condors at night
D. used to keep condors away
参考答案