A.不利于黑尾鹿 B.不利于生態(tài)平衡 C.有利于黑尾鹿 D.有利于生態(tài)平衡
A.春季短 B.食物少 C.降低與天敵相遇的機(jī)率 D.冬季漫長(zhǎng)
A.分?jǐn)偢?jìng)爭(zhēng) B.爭(zhēng)奪競(jìng)爭(zhēng) C.干擾競(jìng)爭(zhēng) D.利用競(jìng)爭(zhēng)