按功能可以将神经元分为
ABC
按功能可以将神经元分为内导神经元(感觉神经元)、外导神经元(运动神经元)和中间神经元。内导神经元收集和传导身体内、外的刺激，到达脊髓和大脑。外导神经元将脊髓和大脑发出的信息传到肌肉和腺体，支配效应器的活动。中间神经元介于两者之间，起联络作用。
For the new country to survive, ________ for its people to enjoy prosperity, new economic policies will be required.
We regret to ________ that it may not be possible to deal with every request.
The farmer had to wear heavy boots in the winter because the fields were too wet and________.