正确答案: A

下肢水肿

题目：下列既是症状也是体征的是 （ ）

解析：A

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举一反三的答案和解析：

[单选题]We were infordmed that our flight ____ because of the mechanic failure

have been canceelled

[单选题]Seafood and ice cream are served at all fast food restaurants．aren’t they?

N0，I’m afraid not．

解析：从句子“Besides，fast food，Italian food．chicken，seafood and ice-cream are very many．”可知卖seafood与ice—cream的快餐店有很多(very many)，但并非所有的快餐店都出售seafood与ice—cream。

[单选题]艺术创作的基础是。（ ）

艺术构思