咽的生理功能( )、( )、( )、( )、( )
参考答案:呼吸功能 吞咽功能 防御保护功能 言语形成功能 扁桃体的免疫功能
It is the prevention of disease_____ its successful treatment that has led to the rapid increase of the world’s population.
A.more than
B.rather than
C.other than
D.less than
焊接过程中个人防护的主要内容是什么?