—The American warships（军舰） have appeared near South China Sea Islands again.
—We must let the Americans know clearly that the islands ______ China.
A：come from
B：belong to
C：care about
D：believe in
下列物体在运动中，受到平衡力的是（ ）
人们通常把那些会让人感到大地上下颠簸、猛烈摇动等地动现象叫____。
