2022牛津英语周报八年级答案

读后縷写【参考范文】We made up our minds to save the nurse with him together.We were faced with falling rubble from time to time. The trappednurse was still alive. We focused our efforts on removing thebricks and the rubble that trapped her body. Once she was freethe doctor guided us through the remains safely. He kept a perfectly caim tone throughout, which smoothed me much. My hearleaped with joy as we successfully walked out of the building. Althe survivors' gratitude was profound and boundless.Later in the afternoon I had time to Look around, and satthe destroyeed building. My beautifui workplace now lay beyonrecognition. The only thing that remained was broken wallsmidst the dim dust. I felt a weignt on my chest as the sednswelled inside. The doctor stood beside me and said with a fsmile,"We should be happy for those who survived the eartquake."I smiled back as the wind danced around us, and Ilucky to be alive.

23.(9分)(1)如图所示(2分)I'mA350300鑘瞤瞤睍龛h輯250200鑘輖睴瞤睴瞤瞤1002(2)增大(2分)3)(2分)(4)8.8(1分)0.6(1分)5.0(1分)【命题意图】本题考查描绘小灯泡伏安特性曲线实验。【解题思路】(1)根据表中数据描点作图,如答图所示。(2)分析表中所测数据可知,随电压表V2示数不断增大,小灯泡电阻将增大,(3)毫安表两端电压为U2-U1,由欧姆定律得,毫安表内阻为rU2-U(4)由电阻的定义式R=—,可得小灯泡电阻R=T=.2500=8.8a;小灯泡消耗的电功率为P=3.45-2.20IU1≈0.6W;毫安表的内阻nA=0.200=5.0

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