急性单核细胞白血病( )
A．PO×强阳性B．细胞内外铁明显减少C．PAS阳性D．α-NAE强阳性E．NAP明显降低
参考答案：D
放止血带后可引起再灌损伤。
—_____ have you been there, Mary?
—Since last winter holiday. [ ]
A. How long
B. How soon
C. When
D. How far
ince last winter holiday. [ ]