____ is a term denoting the determination of a ship’s position by observations of Celestial or terrestrial objects, or by a combination of both.

解析: 【解析题】原植物叶互生;无柄;边缘有不规则的稀疏锯齿,无毛,或背面稍有细毛的中草药是: 【解析题】“烽 […]