A:①②③
B:②③④
C:①②④
D:①③④
材料一:左图为非洲南部区域略图。
材料二:右图为左图中甲、丙两地气候统计图。
求证:△ACE≌△ACF.
如图将半径为4米的圆形纸片折叠后,圆弧恰好经过圆心O,则折痕AB的长为____ 米.
There are ___________ people in the shopping centre.
.I'll never ____ (原谅)you for what you said to me last night.