SAT, 27.11.2021 14:00 sidneylww

Giai cấp có ra đời và tồn tại trong mọi xã hội hay không?vì sao?

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SAT, 28.06.2019 09:30, anacecilianr2325

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.