准晶体
参考答案:
内部质点排列具有远程规律,但没有平移周期,不具格子构造。
在发电机组磨合期间,可在柴油机的润滑系统注入少量清洁柴油,其注入量约为柴油机所需润滑油总量的(),使各机件磨合得更好。
A、1/20~1/40
B、1/30~1/50
C、1/50~1/60
D、1/40~1/60
Which of the following organizational structures is used in large organizations involved in multiple projects
A.Functiona
B.Strong matri
C.Projectize
D.Combination of all of the abov