题目

since you have been to Australia，can you give us a(an) _______ of that country?    A.organization   B. construction   C. recognition    D. description 答案：D用12根火柴棒（等长）拼成一个三角形，火柴棒不允许剩余、重叠和折断，能摆出的三角形的个数是（ ）A. 1B. 2C. 3D. 4