A:①②③④
B:③④②①
C:④③②①
D:②③④①
Does
Emma usually have a lot of
funs
when she
stays
at home
alone
in the holidays?
A
B
C
D
①利用节假日去社区打扫卫生
②为贫困失学儿童献上一片爱心
③报名去支援西部大开发
④关注社会弱势群体,积极扶助老弱病残
银河系、太阳系、地月系三者的关系应该是图中的( )