从一个长10厘米,宽8厘米的长方形纸上剪下一个最大的圆,这个圆的周长是( ) 厘米,面积是( )平方厘米,边角料的面积是( )平方厘米。
25.12;50.24;29.76
动物细胞中的能量转换器是________。
Which statement is TRUE concerning the gooseneck().
A.It is a sailing maneuver which brings the vessel's head through the wind
B.It connects the boom to the mast and allows the boom to swing freely
C.It is a sailing condition where there is a loss of air flow over the sails
D.None of the above