第二节One possible version:When everything was done on the computer, I appreciatedmy work proudly. Then I watched both poems passing through theprinter, the white paper coloring with words that shaped mychildhood. These poems reminded me of my childhood that mydad spent with me. I felt that this was a gift that my dad wouldtruly appreciate, though it was cheap I was looking forward tothe dayMy dad s birthday soon arrived, and our family sat together tocelebrate it. I took out my gift and passed it to my dad. The minuteI saw the look on my dad's face as he opened those letters carefullyplaced in a cheap frame, I knew I had given the perfect gift. Mydad hugged me and said this was the best gift that he had receivedand thanked me for remembering the wonderful moments that weshared together, and we recited the poems together

两AD什么e命题人考查振动与波。么考Q根据题图可知,周期T=2s,波长A=4m,A项正确;波速t=n=2m/s,根据题图乙可知,t=0.25s时刻,b点正向上运动,再结合题图甲可知,该波向右传播,B项错误;质点c与质点e相距半个波长,它们的运动方向总相反,C项正确;:t=0.25s时,质点d从波谷位置向上运动,再经过0.58=工,即在t=0.758时,质点d处于平衡位置并正在向y轴正方向运动,D项正确;各质点只在平衡位置上下做简谐运动,并不随波迁移,E项错误。(2)(什么命题人考查光的折射与全反射。么考①单色光射到AC边的入射角i=60°,折射角为,则根据折射率公式有!=n(2分)得:=30°(1分)光线DE射到斜面AB时,=60°设棱镜的临界角为C,则sinC=n3sm60°=25(2分)即光射到AB边时发生全发射,光路图如图所示因θ=60°,反射光线与AB边的夹角是30°,所以单色光从BC边垂直射出,即与该边的夹角为90°(2分)②由几何关系可知,光在三棱镜中通过的距离为DE+FE=2+(2-1cm6)a(1分)=n=(1分)FE+DE,所以t53L6(1分)

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