A:4(x+1)=x-3(5x-1)
B:x+1=12x-(5x-1)
C:3(x+1)=12x-4(5x-1)
D:3(x+1)=x-4(5x-1)
① ____;②____;③____;④____.
如图是人体内主要内分泌腺示意图.据图回答下列问题: