With a geological history of more than______billion years Australia is one of the oldest land masses in the world. ( )

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问题 With a geological history of more than______billion years Australia is one of the oldest land masses in the world. (  )

选项 A、1
B、2
C、3
D、4

答案C

解析 澳大利亚有30亿年以上的地质史,是世界上最古老的大陆之一。
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