一战斗机飞行员驾驶飞机在万米高空的竖直平面内做匀速圆周运动,飞行速度为1080km/h,已知在最低点时飞钒的加速度为60m/s2(取g=10m/s2)
—The American warships(军舰) have appeared near South China Sea Islands again.
—We must let the Americans know clearly that the islands ______ China.
解读右图,启示我们( )
划线字注音错误的一项是( )