题目内容

（）is parallel to the ground, and the animal body is divided into two asymmetrical parts: the back and the abdomen

A. The forehead
B. Sagittal plane
Cross section
D. None of the above

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（）is one of the nuclear components, which has the functions of rRNA synthesis, processing and ribosome subunit assembly

A. Nuclear membrane
B. Caryoplasm
Chromatin
D. Nucleolus

The organelle related to cell division and spindle formation is（）

A. mitochondrion
B. centrosome
C. endoplasmic reticulum
D. Golgi complex

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A. the President
B. the high-level managers
C. the employees
D. all the above

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A. larger effect
B. no effect
C. less effect
D. equal effect