My favourite teacher is our English teacher. She is a very beautiful woman. She is thirty-six years old. She has a round face, black hair, big eyes, a small nose and a small mouth. She is very kind to us. She often plays games with us. S
下图表示世界葡萄黄金种植带(阴影区域)和葡萄种植园景观图,与大陆东岸相比,该“黄金种植带”在北半球的大陆西岸较宽,是因为( )
已知锐角△ABC中,边BC长为12,高AD长为8.
若神舟系列飞船都绕地球做匀速圆周运动,则离地面越近的飞船( )
如图,AD为△ABC外接圆的直径,AD⊥BC,垂足为点F,∠ABC的平分线交AD于点E,连接BD,CD.