童谣唱道：“太阳大，地球小，太阳带着地球跑；地球大，月球小，地球带着月球跑。”据此，回答1—3题。
1、童谣中出现的天体都属于：①太阳系、②地月系、③银河系、④河外星系、⑤总星系 [ ]
A、①②③⑤
B、①②④⑤
C、①③④⑤
D、①③⑤
2、童谣中提到的唯一一颗适合生物生存和繁衍的天体是____，与它产生生物的条件无关的是_____。 [ ]
A、月球，昼夜交替周期很长
B、地球，自转的方向是自西向东
C、月球，它与太阳距离适中
D、地球，天体的体积、质量适中
3、银河系、太阳系、地月系三者关系应该是下图中的
A、A
B、B
C、C
D、D
1、D
2、B
3、A
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