【多选题】【消耗次数：1】
水土流失的类型包括（）：。
①
A.水力侵蚀
②
B.风力侵蚀
③
C.重力侵蚀
④
D.冻融侵蚀
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【多选题】
在水力、风力、重力及冻融等自然营力和人类活动作用下，水土资源和土地生产能力的破坏和损失，包括（）：。
①
A.土地表层侵蚀
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bravery before danger
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