第三节One possible version:Paragraph 1On the Christmas of 1995, a drunken lady said some-thing that amoke him and he realized he had found hisdream girl. That was why the guy did not bother to lookfurther when he realized the girl was not coming backRealizing that he had let away someone so important in hislife. he decided to call her immediately. His whole mindwas flooded with fear. He was afraid that she might havefound someone new or no longer had the same feelings anymore. He tried again and again, never giving up. Finallygot through. He expressed his love for her and thewas moved to tears. She was still waiting for him, nevergiving up.Paragraph 2He decided to y to vancouver to join her. It was thehappiest time of their lizes! But their happy time was short-lived.Two days before he was supposed to fly to Vancou-ver. he received a call from her father. She had a head-oncar collision with a drunken driver. Anyone can imagine theheart-broken feelings he had. Why did fate play such cruelames with him? How he hated himself for taking so long togarealize his mistake I That was in 1996

21.AD解析:本题考查变压器。高压输电时线路中的电流较小,输电线路电压损耗小,因此L1两端的电压比L2两端电压低故A项正确;由于输电线路有电阻,因此B1输出的功率大于B2输入的功率,B项错误;A的示数比④的示数大C项错误;A、B端输入的交变电流频率为50Hz,电流的方向每秒改变100次,故D项正确【解题技巧】远距离输电采用高压,目的就是减少电能的损失,由于④的示数比④的示数大,L获得的功率比L2获得的功率小

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