Thank you for ____ (show) us around your school.
小丽用伏安法测量电阻R的阻值时,电压表和电流表的示数如图所示,则电压为 ____ V,电流为____ A.电阻R的阻值为____ Ω.
Wendy is manager of customer service at ABC Products. She received the following letters from customers. Read the letters and answer the questions.
已知甲、乙、丙三个旅行团的游客人数都相等,且毎一个旅行团游客的平均年龄都是35岁,这三个旅行团游客年龄的方差分别是S甲2=17,S乙2=14.6,S丙3=19,如果你最喜欢带游客年龄相近的旅行团,若在三个旅行团中选一个,则你应选择( )