题目

为测定某旧干电池的电动势和内阻，实验室提供了如下器材：A.旧干电池两节（假设两节电池完全一样）；B.电压表（视为理想电压表，量程0~3V）；C.电阻箱R（0~999.9Ω）；D.定值电阻；E.多用电表；F.开关、导线若干.（1）同学甲直接使用多用电表的直流电压2.5V挡测量一节电池的电动势，读数如图所示，则该同学测得的电动势E=_______，此测量值比旧干电池电动势的真实值______（选填“偏大”或者“偏小”）.（2）同学乙将两节干电池串联接入如甲所示的五位中国学生要去美国留学，他们想要找住家。请仔细阅读题中的学生的个人情况说明，并从A至F六个选项中，帮助他们选择最适合的住家. 1.Zhang Chao likes Chinese food. He hopes his host family speak a little Chinese. 2.Li Wei likes doing sports. He wants to live near a park. 3.Liu Yong hopes to live near his school---Reading School. He prefers a bed room with a bathroom 4.Chen Yao wants to live in a big bedroom cheaper than ￡350 a month. She can’t stand pets. 5.Hu Mei loves pets. She would like a bedroom cheaper than ￡220 a month.