第3题: [单项选择]“The goods are in nude.”means______. A. The goods are packed with wooden box B. The goods are packed with iron box C. No basket is used for the goods D. No package is used for the goods 参考答案:D
第4题: [单项选择]二尖瓣狭窄最常见的病因 A. 炎症 B. 黏液样变性 C. 退行性改变 D. 缺血性坏死 E. 创伤 参考答案:A