A:自然天体运行规律
B:社会发展规律
C:封建道德规范的三纲五常
D:“天人感应”的理论
关于如图俄罗斯的叙述不正确的一项是
– Why don't you go out to have fun?
– You see, we are studying for the tests these days. And we are ______ busy_____ we can't go out.
青海湖参与的水循环类型是( )
读“我国南、北方地区景观示意图”,完成下列问题.