判断题 Python语言是一种通用语言，可以用于科学计算、数据分析、网站开发等多个方面。

单项选择题 Which of the following statement is not included in the characteristics of indirect communication style? A、Speakersdon’t always say what they mean. B、 Speakers are more likely to suggest or imply than to come out C、Speakers often mean exactly what they say. D、 Listeners have to read between the lines.

单项选择题 3,5-二羟基黄酮与7,4'-二羟基黄酮的区别可用( )。A. 盐酸-镁粉反应B. 醋酸镁反应C. 四氢硼钠反应D. 二氯氧锆盐-枸盐酸反应