内部环境分析因素包括优势因素和劣势因素，他们是公司在其发展中自身存在的积极和消极因素，属主动因素。
参考答案：对
After being questioned by the police , he admitted ____in the supply of drugs over a 20-year period.
A． to be involved
B． being involved
C． involved
D． been involving
车削薄壁工件的内孔精车刀的副偏角k’r，应比外圆精车刀的副偏角选得（）。
A．大一倍
B．小一半
C．同样大
