【简答题】n. person considered separately from their society
【单选题】双子叶植物根初生维管组织中,木质部与韧皮部的排列是 ________ 。
【简答题】________ n. the way from one place to another on a map
【简答题】She has a physics (n.) from Edinburgh.
【简答题】n. the activity of protecting something from loss or er
【单选题】下列关于重心的表述中正确的是 ( )
D.
质量分布不均匀但形状规则的物体重心在它的几何中心