题型:判断题 经过挑拣、清洗、消毒、保鲜、包装等一系列工序后,青椒、豆角、金针菇等普通蔬菜的价格往往能够增加不少,其根本原因在于这些蔬菜的( )A.使用价值量增加了B.价值量增加了C.劳动生产率提高了D.质量提高了 查看答案
题型:判断题 Japan's nuclear accident ________ happened in March has brought the world's attention to nuclear problems once again. [ ]A. which B. whatC. where 查看答案