As the years passed, many occasions-birthdays, awards, graduations__________ with Dad's flowers.  [ ]

A. are marked            

B. were marked        

C. have marked          

D. had marked

POX染色多呈阴性，PAS反应阳性产物为红色粗颗粒状或块状，底色不红（）

A.红白血病

B.缺铁性贫血

C.毛细胞性白血病

D.急性淋巴细胞白血病

E.急性单核细胞白血病