What was Britain’s strategy during its war
题型：单项选择题
问题：
What was Britain’s strategy during its war with France().
A.Maintaining its superior sea skills and technology.
B.Planning an immediate attack.
C.Keeping a three-to-two advantage over France.
D.Fighting a defensive war.
，那么物体在最低点时，受到的摩擦力是多大？