【单选题】【消耗次数：1】
目前，生物多样性的保护已成为人类关注的热点之一.生物多样性面临威胁的主要原因是（）。
①
A.滥砍乱伐
②
B.栖息地的丧失
③
C.滥捕乱杀
④
D.外来生物入侵
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【多选题】
我国生物多样性保护行动主要包括（）。
①
A.完善法律法规体系和体制机制
②
B.发布实施一系列生物多样性保护规划
③
C.加强保护体系建设
④
D.推动生物资源的可持续利用
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