题目

“至迟到春秋末期，我国已经开始使用牛耕地。”七年级一班的同学想证明这一观点的正确性，以下说法中最不可靠的是（ ） A . 考古挖掘发现了春秋事情反映牛耕的文物 B . 战国初期的典籍中关于春秋时期“宗庙之牺，为畎亩之勤”的记载 C . 考古学家挖掘出春秋时期的牛骨头 D . 考古学家发现春秋时期刻在石壁上的牛耕图   The key to a healthy 1. d is to do the followingEat the right 2. a of calories (热量) for how active you are,so that you 3. (平衡) the energy you consume(消耗) with that you lise. If you eat or drink too much,you'11 put 4.weight. On the 5. c , if you eat and drink too little,you’ 11 6.I weight. It is suggested that men have around 2 ,500 calories a day while women should have around 2 ,000 calories a day. Most adults are eating more calories than they need,and 7. o   to eat fewer calories.