第8题: [单项选择]巨幼红细胞性贫血宜选用() A. 硫酸亚铁 B. 促红细胞生成素(EPO) C. 维生素B↓(12)和叶酸 D. 泼尼松 E. 雄激素 参考答案:C
第9题: [填空题]
What is .required in many different situations in American culture
An expression of ______ . 参考答案:thanks 答案解析:[听力原文]11-15
(Q11)Many different situations in American culture require an expression of thanks.