单项选择题
Questions 8 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now, listen to the conversation.
What is the conversation mainly about()
A.How to avoid clashes of exams. B.How to schedule exams. C.How to use the faculty lounge. D.How to choose the courses.
判断题 玉石的定义:玉,石之美者,有五德:色纯、洁净、坚硬、温润、内外一致。() 修改:___________________________________________________________
单项选择题 我国财政政策的目标是()。
单项选择题 各种减压阀的原理是介质通过阀瓣通道小孔时阻力增大,经节流造成压力损耗从而达到减压目的,减压阀的进、出口一般要伴装()。