之所以要坚持公有制的主体地位,是因为( ) A.公有制比重越大越能促进生产力的发展 B.公有制是社会主义经济制度的基础 C.是由我国的分配制度决定的 D.公有制是解放和发展生产力的根本途径 答案:B . --Did you see ________ may be the longest total solar eclipse (日全食)in 500 years yesterday? --No, it was cloudy above my city at that time. A. what B. that C. who D. all