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Write down characters according to the given pinyin.tóng shì ______ 事

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Write down characters according to the given pinyin.chū xiàn ______ 现

Write down characters according to the given pinyin.shì jiè______ 界

Write down characters according to the given pinyin.chī jīng______ 惊

Which cellular component can be seen with the electron microscope?

A. DNA
B. cell wall
C. nucleus
D. cytoplasm
E. all

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