题目

 Goodness! Teddy is late again! It’s _____ of him to keep us waiting! A. normal                    B. typical              C. visual               D. particular 答案：B一个正方形和两个等边三角形的位置如图所示，若∠3 = 60°，则∠1+∠2 =（   ） A．80°B．90°C．120°D．180°