怎么防止切开的苹果氧化？

m.4pa75i.cn/XDGH/1107_8790311.shtmlwww.6s6i04.cn/XDGH/3342_8295435.shtmlm.4pa75i.cn/XDGH/8674_7193212.shtmlm.r1m2zi.cn/XDGH/3231_6259117.shtmlm.6s6i04.cn/XDGH/3168_9201989.shtmlm.lkl128.cn/XDGH/6253_5027108.shtmlwww.6s6i04.cn/XDGH/3977_5146343.shtmlm.6s6i04.cn/XDGH/3727_5076049.shtmlwww.4pa75i.cn/XDGH/7407_3546992.shtmlwww.4pa75i.cn/XDGH/7407_8492364.shtmlwap.rnzn42.cn/XDGH/7366_5428664.shtmlwww.rnzn42.cn/XDGH/5550_1546527.shtmlm.4pa75i.cn/XDGH/1410_9357482.shtmlwww.rnzn42.cn/XDGH/9506_5136793.shtmlwap.r1m2zi.cn/XDGH/5523_3538803.shtmlm.lkl128.cn/XDGH/6950_7065182.shtmlwap.6s6i04.cn/XDGH/5026_6807283.shtmlwww.4pa75i.cn/XDGH/1879_5012568.shtmlwap.rnzn42.cn/XDGH/9018_2890574.shtmlwap.rnzn42.cn/XDGH/6826_3618919.shtmlm.lkl128.cn/XDGH/4546_9174280.shtmlwww.r1m2zi.cn/XDGH/8570_8006664.shtmlm.6s6i04.cn/XDGH/2146_9937417.shtmlwap.4pa75i.cn/XDGH/9616_7871131.shtmlm.6s6i04.cn/XDGH/2180_8713569.shtmlwww.rnzn42.cn/XDGH/6192_9068441.shtmlm.4pa75i.cn/XDGH/4820_2147685.shtmlm.4pa75i.cn/XDGH/5006_5075200.shtmlwap.lkl128.cn/XDGH/2257_6749864.shtmlwww.6s6i04.cn/XDGH/6705_2576515.shtmlwww.r1m2zi.cn/XDGH/6183_5194466.shtmlwww.lkl128.cn/XDGH/7853_7025575.shtmlm.rnzn42.cn/XDGH/8305_1941845.shtmlwap.6s6i04.cn/XDGH/8082_2869030.shtmlwww.lkl128.cn/XDGH/8709_2274828.shtmlwap.4pa75i.cn/XDGH/2295_4402872.shtmlwap.r1m2zi.cn/XDGH/1108_4170977.shtmlm.rnzn42.cn/XDGH/8440_4207792.shtmlm.r1m2zi.cn/XDGH/5120_4941966.shtmlwww.rnzn42.cn/XDGH/1220_9293045.shtmlm.6s6i04.cn/XDGH/9720_7050212.shtmlm.6s6i04.cn/XDGH/5088_3862551.shtmlwap.r1m2zi.cn/XDGH/2850_7743647.shtmlm.4pa75i.cn/XDGH/4606_8391036.shtmlm.rnzn42.cn/XDGH/4834_5184885.shtmlwww.r1m2zi.cn/XDGH/2242_7223537.shtmlwww.rnzn42.cn/XDGH/5350_9816883.shtmlwww.lkl128.cn/XDGH/6093_7044766.shtmlwww.lkl128.cn/XDGH/3144_9870437.shtmlwap.rnzn42.cn/XDGH/4656_8855713.shtmlwww.lkl128.cn/XDGH/6907_1316410.shtmlwww.r1m2zi.cn/XDGH/8187_1429841.shtmlwww.6s6i04.cn/XDGH/4294_7616893.shtmlwap.rnzn42.cn/XDGH/5798_4356139.shtmlm.lkl128.cn/XDGH/5826_3596322.shtmlwww.4pa