一个四年级的孩子在日记中写道:“我希望老师每次进教室都能带着曙光女神般的微笑。”一个二年级的孩子在课堂上说:“老师的脸就像变幻莫测的天空,时而披着绚丽的朝霞,时而密布着阴暗的乌云……多希望老师的脸上天天有美丽的笑容啊!”那,微笑是什么,孩子们那么渴盼?难道它仅是 A fourth-grade child wrote in his diary: “I hope the teacher can smile with a goddess of the gods every time I go into the classroom.” A sophomore's child said in class: “The teacher's face is like a vagaries The sky, sometimes gorgeous glow, sometimes covered with dark clouds ... ... More hope every day on the teacher's face a beautiful smile! ”Then, what is the smile, the children so eager? Is it just