下列检查中哪一项对缺铁性贫血最有诊断意义
A. 血红蛋白减少
B. 血清铁减少
C. 总铁结合力增高
D. 骨髓铁粒染色阴性
E. 小细胞低色素性贫血
The word "flies" in the second sentence of the second paragraph means______.
A. flights
B. carriages
C. journeys
D. butterflies
______was proclaimed Canada's national anthem on July 1, 1980.
A. "God Save the Queen"
B. "The Star-Spangled Banner"
C. "O Canada"
D. "March of the Volunteers"
设置制单控制是在( )中进行的。
A. 凭证页签
B. 账簿页签
C. 会计日历
D. 其他