题目内容

治疗叶酸缺乏性巨幼细胞遗传性贫血,服用()

A. 维生素A
B. 叶酸
C. 维生素B6
D. 维生素C
E. 维生素D

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儿童肺部感染时易引起间质性炎症的原因是()

A. 支气管官腔相对狭窄
B. 肺间质旺盛,血管丰富
C. 肺弹力组织发育差
D. 肺泡数量少
E. 抵抗力差

A preferred stock pays an annual dividend of 3 dollars a share and competitive yields are 5%. A call feature is added at 50 dollars in three years. Its market price is 50 dollars. Which of the following should you select? ______

A. Buy
B. Sell
C. Short Sale
Do nothing

Some preferred stocks are not perpetual and must be retired at some specified time period. ()

Earnings per preferred share is a ratio of earnings divided by preferred dividend requirements. ()