题目

如图所示，电路两端电压U保持不变。 (1)若电阻R1、R2、R3消耗的电功率一样大,则电阻之比R1∶R2∶R3= 。  (2)若电阻R1=R2=R3,则它们在相同时间内产生的热量之比Q1∶Q2∶Q3= 。 答案：(1)1∶4∶4 (2)4∶1∶1    此题要求改正所给短文中的错误。全文共十处错误，每句中最多有两处。错误渉及一个单词的增加、删改或修改。此句多一个词：把多余的词用（﹨）划掉。此句缺一个词：在缺词处加一个漏字符号（∧），在正下方写出该加的词。此句错一个词; 在错的词下划一横线,在该词的正下方写出改正后的词。注意：1.每处错误及其修改只限一词；2．只允许修改10处，多者（从第11处起）不计分。This morning I went to the English corner in the park near my home. It was three years since it was found. Many middle school students as good as college students and foreigners take part the activity. People there practice speak English by talking about something interesting. People also exchange the experience in English learning. I think it is good chance for me to use that I have learned in my English class. I was felt very cool after I got back home. I’ll try my best for learn English better,for it is so wide used in the world.