药浴是防治绵山羊疥癣等外寄生虫的一种有效方法，药浴的时间一般在剪毛后（）天
参考答案：10-15
站在任一位置，最多只能看到正方体或长方体的三个面______．
Reviewing work products and results to ensure that all were completed satisfactorily and formally accepted is part of ______ .
A．risk management
B．quality control
C．change control management
D．verify scope
