英语周报第十二期hz答案

第二节书面表达NoticeDear studentsIn order to carry forward China's time-honoredraditional culture and expand the international influence ofChinese culture. the Student Union of our school will holda Tang and Song Poetry Recitation Contest. All theexchange students who feel interested and have a passionfor Chinese culture are welcome to participate in thecontest. We will appreciate the beauty of Tang and Songpoetry and fecl the charm of Chinese literature togetherLet's recite poetry, taste classics and feel literature. Wewill be seeing each other in the school hall on May 5thThe Student ur

23.(1)1.200(2分)(2)①1)R(2分)②3.002分)(3)1.78×102或1.79×102(3分)【解析】(1)铜导线的直径d=1mm+20.0X0.0lmm=1.200mm(2)通过铜导线的电流为L=I=,则R=1)R,整理可得=Rb+1;由图象可得斜率k=R8.50-1.02.50n=3.00(3)由电阻定律R,=p,得L=S=R,3.00×3.14×(1.200×10-3)24×1.90×10-m≈1.78×102m,

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