如图一个弯形管道ABCD的拐角∠ABC=120°，∠BCD=60°，这时说管道AB∥CD，是根据____ 

①社会主义初级阶段是建设中国特色社会主义的总依据

②社会主义初级阶段是一个不发达的阶段，是一个很长的历史阶段

③是当代中国的最基本国情

④中心工作是经济建设

    My grandpa has a farm. The farm is very big and beautiful. There are many animals on the farm. There are ten horses, seven goats, nine cows and many hens. The cows are black and white. The goats are white. The hens are very fat. My grandpa likes vegetables. So  there are a lot of potatoes, green beans, carrots and tomatoes. I like potatoes. My sister likes green beans. We all like this farm very much.