A:to be worked out
B:working out
C:to work out
D:working them out
如图是桃花结构示意图,能发育成果实的结构是( )
若x,y满足|x﹣3|+y-6=0,则以x,y的值为两边长的等腰三角形的周长为( )
以下工具中,我们测量百米的速度所用到的测量工具有( )
—My mother is nice to all her students. And she gets on well with all her friends.
血液与组织细胞之间进行物质交换的场所是( )。