第19题: [单项选择]可用水蒸气蒸馏法分离的是() A. 吗啡 B. 小檗碱 C. 莨菪碱 D. 麻黄碱 E. 苦参碱 参考答案:D
第20题: [单项选择]How many people were killed in the suicide bomb attack A. At most two. B. At least eleven. B. Up to thirty. 参考答案:B 答案解析:[听力原文] The Nigerian military says there has been a double suicide bomb attack on a church inside