颌面及颈部较大创口和脓腔的引流常用
A．纱条引流
B．“烟卷”引流
C．片状引流
D．管状引流
E．负压引流
参考答案：D
There are countless ________ leaves as if they were a red blanket_______ the ground.
A．fallen; covering
B．falling; covered
C．fallen; covered
D．falling ; covering
加强施工物资采购合同管理的意义何在？
