____ 是主要的遗传物质．
My host family tried to cook ____ for me when I studied in New Zealand.
— . I just had some rice.
①给萎蔫的蔬菜喷洒清水 ②糖拌西红柿 ③萎蔫的萝卜泡在清水里 ④腌渍的青菜．
