题干
A year has four seasons and it ____________ twelve different star signs.
A：divided into
B：is dividing into
C：dividing into
D：is divided into
答案(点此获取答案解析）
D
A year has four seasons and it ____________ twelve different star signs.
A：divided into
B：is dividing into
C：dividing into
D：is divided into
的正方形的四个顶点上．已知引力常量为G．关于四星系统，下列说法错误的是（忽略星体自转）（ ）