良好的协调一致的师生关系具有多种功能，包括激励功能、调节功能和________功能。
参考答案：德育
Mr. Brown is ________ a teacher to us, we look on him as our friend.
more than B. more or less C. less than D. no more
离心泵的大修程序分哪几个步骤？
