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多项选择题

全身性水肿包括（   ） A.
心源性水肿 B.
肾源性水肿 C.
肝源性水肿 D.
营养不良性水肿

问答题

Many animals are under the threat of extinction because of the rapid change in their ____________ environment.
A、nature
B、natural
C、naturally