A. 正确 B. 错误
A. 严肃性 B. 严格性 C. 强制性
A. 七星瓢虫 B. 黑缘红瓢虫 C. 草蛉 D. 蚂蚁
A. She will have a large metacentric height B. Her period of roll will be large due to her large metacentric height C. She will have an unusually high center of gravity D. She will pitch heavily
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