— Yes, it's well worth ________. It's ________ moving that I've seen it twice.
A:seeing; so
B:to see; enough
C:seeing; too
D:to see; such
受地理位置、地形、气候等因素的影响,我国南、北方地区自然景观差异显著,据此回答以下问题。
坐在顺水漂流的船中的乘客,我们说他静止是以下列什么物体为参照物的( )