A:体液调节的信号是化学物质,神经调节的信号就是神经冲动
B:动物的生命活动往往同时受神经调节和体液调节
C:某种意义上,体液调节可以看做神经调节的一个环节
D:神经调节和体液调节都有分级调节的现象
—I like of them. They are useful for English learning.
If you take my _____,you won't tell anyone about it.