题目内容

以下()是世界文化和自然双重遗产。

A. 都江堰一青城山
B. 峨眉山一乐山大佛
C. 卧龙一九寨沟
D. 黄龙一九寨沟

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The ________ was established to maintain order in the international monetary system.

生奶的抑菌作用在O"C时可保持48小时,()可保持3小时。

A. 30℃
B. 20℃
C. 10℃
D. 5℃

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