下列化合物按酸性减弱的顺序排列的是( )

A、mainly generated by liver
B、blood IGF levels and GH levels are inversely proportional
C、induces GH-mediated growth promoting effect
D、has no significant effect on brain growth

A、不能编辑事件响应
B、有利于布局
C、有利于重用
D、有利于页面风格一致