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