①民族资本主义的发展 ②向西方学习 ③ 强烈的爱国主义 ④ 资产阶级民主化趋势
A:①②③
B:①②
C:③④
D:①②③④
如图所示,虚线AB和CD分别为椭圆的长轴和短轴,相交于O点,两个等量异号点电荷分别位于椭圆的两个焦点M,N上.下列说法中正确的是( )
—Where are you going for your winter holiday?
—I’m going to visit Kunming. It is ______ too hot _______ too cold.