My favourite animal is rabbit. I have a rabbit. Its name is sweet. It's very small. It's white. It has long ears. It has a short tail. It has red eyes. It likes eating carrots. It likes jumping. I like it very much. It’
“酒驾”是当前热门话题之一。交通警察检查驾驶员是否饮酒的仪器里装有K2Cr 2O7 ,K2Cr 2O7 中Cr元素的化合价为（ ）
