船舶的漂心F是指（）。
A．船舶排水体积的形心
B．船舶水线面面积的几何中心
C．船舶所受重力的作用中心
D．船舶倾斜前后两条浮力作用线的交点
参考答案：B
It was the belief _____ Alex Haley could find his “root” in Africa______ made him decide to go to Gambia.
A．that; which
B．which; which
C．that; where
D．that; that
