Questions 19 to 21 are based on the conversation you have just heard.
A. He lives on the 10th floor of Butler Hall. B. He never wants to listen to students.
B. C. He used to teach biology. D. He is an excellent professor.
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一台计算机可能会有多种多样的指令,这些指令的集合就是______。
设置幻灯片的“水平百叶窗”、“盒状展开”等切换效果时,不能设置切换速度。( )
A. 对
B. 错
在默认情况下,资源管理器将文件按其名字的______顺序列出,也可以选择按文件大小、日期、类型的顺序来显示文件。