单项选择题 Read the statements and answer choices. Then listen to a group of students discussing a group project for a class. There is a place in the conversation where information is missing. Listen and choose the best answer using context clues. During the first missing part after one of the women said,"that sounds good to me, but first...", the students were probably discussing__________. 109 A、the topic of the presentation B、the importance of Celtic music C、the role of each group member D、/

单项选择题 移动医疗包括媒体、硬件、软件和内容等四项技术。从内容上来看，它是以视频、音频、图像和文本的方式传播信息，其中大部分都是加密的，以（ ）的形式传输。（ ） A. XML B. TXT C. DOC D. XLS

判断题 塔的填料是一种固体填充物，其作用是为气、液两相提供充分的接触面（ ）。 正确 错误