题目

单词拼写(根据中文提示拼写单词)【1】He looks so _______________ (熟悉的) but I can't remember his name.【2】He _______________ (点头) to me in greeting when I entered the room.【3】He has one _______________ (肩膀) a little higher than the other.【4】The grandchild nods his head to show his _______________ (同意) to his grandpa.【5】I agree, but Wei Ming feels _______________ (不同地).【6】There was nothing but _______________ (寂静) in the room.【7】It's _______________ (粗鲁的) to make noises while eating in China.【8】Please _______________ (检图中的粗线CD表示某条公路的一段，其中AmB是一段圆弧，AC、BD是线段，且AC、BD分别与圆弧相切于点A、B，线段AB=180m，∠ABD=150°。（1）画出圆弧的圆心O；（2）求A到B这段弧形公路的长。