四肢对称性紫癜伴关节疼痛见于（）

A.血友病

B.再生障碍性贫血

C.过敏性紫癜

D.血小板减少性紫癜

E.播散性血管内凝血

To define variance thresholds at designated time points over the duration of a project, you will use ______ .

A) units of measure
B) precision level
C) organizational procedure links
D) control thresholds