题目

小明把如图所示的矩形纸板ABCD挂在墙上，E为AD中点，且∠ABD＝60°，并用它玩飞镖游戏(每次飞镖均落在纸板上)，击中阴影区域的概率是________． 答案：--This is _________ story I’ve told you about several times.--It’s great .I’ve never heard _______ more exciting one.A.the , a B.the ; the C.a; a D.at ; the