___________ life began on the earth is one of the biggest pu

___________ life began on the earth is one of the biggest puzzles to scientists.

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--Let's throw a surprise party for mom's 50 birthday.--That'

--Let's throw a surprise party for mom's 50 birthday.--That's a good idea. We___

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How did the man feel at the woman's words?(  )

How did the man feel at the woman's words?(  )

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听材料,回答第题。In which year was the Nobel Prize first awarded?

听材料,回答第题。In which year was the Nobel Prize first awarded?

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