A: 常绿阔叶林
B: 落叶阔叶林
C: 针叶林
D:苔原
称量物体质量时,天平盘中有50g砝码一只、l0g砝码一只,当移动游码至2.4g刻度时平衡,则被测物体的质量为____g
为了检验人躺着和站立时身体长度是否有差异,选用下列哪种尺子最合适 ( )
we,the,classroom,are,maths,in,having,a,class(.)
人类祖先与猿分界的重要标志是( )
About _______ of the students in our class were born in the _______.