• 2021-04-14 问题

    Nearly all animal migrations happen for one reason only-survival.(survival)

    Nearly all animal migrations happen for one reason only-survival.(survival)

  • 2022-06-01 问题

    By listening to the sounds fishes make, man can learn all the following except (). A: their sizes B: the usual pattern of their migrations C: their environments D: their habits

    By listening to the sounds fishes make, man can learn all the following except (). A: their sizes B: the usual pattern of their migrations C: their environments D: their habits

  • 2022-06-07 问题

    What are the causes of great migrations in ancient China? ( ) A: growing population B: natural disaster C: war of the north China D: spreading of infectious disease E: bad weather

    What are the causes of great migrations in ancient China? ( ) A: growing population B: natural disaster C: war of the north China D: spreading of infectious disease E: bad weather

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