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TURIN, Feb. 15（Xinhuanet）—Chinese Wang Meng won the women’s 500m short track speed skating Wednesday night, getting China’s first gold medal in the Turin Winter Olympic Games.        Chinese Wang Meng won the women’s 500m short track speed skating gold medal at the Turin Winter Olympics here on Feb. 15, 2006.    Wang Meng led all the way to clock 44.345 seconds, winning the nation’s third Winter Olympic gold after Yang Yang’s two in 2002. The 20-year-old Wang, who has won four World Cup racesover 500m, proved herself as the most consistent short tracker in the world. �如图电路中,电源电动势为E、内阻为r.闭合开关S，增大可变电阻R的阻值后,电压表示数的变化量为△U,在这个过程中,下列判所正确的是A. 电阻R1两端的电压减小，减小量等于△UB. 电容器的带电量减小,减小量小于C△UC. 电压表的示数U和电流表的示数I的比值不变D. 电压表示数变化量△U和电流表示数变化△I的比值不变