固定大桅用的绳索称为：（）
A.动索
B.静索
C.稳定索
D.固定索
参考答案：B
如果说“五德终始说”体现的是邹衍的时间观念，那么“（）”则体现了他的空间观念。
When he moved to Germany in ______, he was already in _________.
A．the fifties; his sixties
B．fifties ; his sixties
C．his fifties; his sixties
D．fifty; sixty
