All (living) things are (made up of) one or more cells, and each of these cells

游客2024-01-05  11

问题 All (living) things are (made up of) one or more cells, and each of these cells (were) produced by an (already existing) cell.

选项 A、living
B、made up of
C、were
D、already existing

答案 C

解析
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