我国的有关法律规定，公民具有政治上的行为能力的法定起始年龄是18周岁。( )
参考答案：对
Some scientists have suggested that Earth is a kind of zoo or wildlife ______ for intelligent space beings, like the wilderness areas we have set up on earth to allow animals to develop naturally while we observe them.
A．conservation
B．maintenance
C．storage
D．reserve
井控
