属于生态系统的非生物环境的有( )。
A．太阳能
B．光
C．脂肪
D．绿色植物
参考答案：A,B
Education is not an end, but a means to an end. ______, we do not educate children only for the aim of educating them.
A．In the end
B．After all
C．In other words
D．In the meantime
加氢裂化的定义？
