化脓性关节炎最早出现的影像学征象是()
A.关节间隙增宽
B.关节囊增大,密度增高
C.关节周围软组织炎性肿胀
D.关节软骨下骨质破坏
E.局部骨质疏松
参考答案:C
投资项目后评价的项目全过程的回顾和总结一般分四个阶段,即前期决策、( )、建设实施、投产运营。
A.前期准备
B.建设准备
C.项目规划
D.项目分析
An analyst obtains statistics on return information for Vay Industries and Ranch Meatpacking as follows:
Based on this information, what is the covariance between the two sets of returns, and what is the correlation coefficient Covariance Correlation coefficient()①A. 5.98 0.32
②B. 5.98 0.42
③C. 6.52 0.32
A.①
B.②
C.③