骨髓检查巨核细胞常减少或缺如的是( )
A.急性粒细胞白血病B.原发性血小板减少性紫癜C.巨幼细胞性贫血D.缺铁性贫血E.血栓性血小板减少性紫癜
参考答案:A
You should make an ____ plan in case anything unexpected happens.
A.active
B.alternative
C.convenient
D.economic