这组数据的中位数是（____），平均数是（____），用（____）表示这些车间的生产情况比较合适。

如图为实验室常用电流表的内部结构图．多匝金属线圈悬置在磁体的两极间，线圈与一根指针相连．当线圈中有电流通过时，它受力转动带动指针偏转，便可显示出电流的大小．下列与此工作原理相同的电器设备是（　　）

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  类推是学习化学时常用的思维方式．以下类推结果正确的是（　　）

    My name is Jim. I am a student. At school, I have a good friend. His name is Mike. He is tall. He has short hair. We are classmates, too. We go to school at  7:00  o'clock. We go home at  5:00. It's  3:15  now. It's time to play games. Let's go to the playground. We play football with some boys. Jim and Mike are               。