从选举法诞生到对现行选举法的五次修改,从等额选举到差额选举,从农村和城市全国人大代表所代表的人口数比例为8∶1到城乡“同票同权”……我国选举制度的发展( )
①反映了我国的国情和我国社会主义民主法制建设进程的实际
②反映了我国社会经济制度的发展、物质生活条件的改善和选民文化水平的提高
③表明选举方式要反映国家性质,并符合全体公民的利益
④说明我国公民的科学文化素质决定我国选举方式的变化与发展
A:①②
B:③④
C:①④
D:②③
Tom and Gina usually go to school by car .They drive(驾车) pasta cinema a supermarket a post office. The post office is next to the supermarket on Center Street .Mary and Ann usually go to school by bus. They go down Sixth Avenue, past a bank and a library. The bank is across from the library. Jenny usually goes to work by bike,he rides(骑车) past a hotel and three streets.
如图过拋物线y2=2px(p>0)的焦点F的直线依次交拋物线及准线于点A,B,C,若|BC|=2|BF|,且|AF|=3,则拋物线的方程为( )