题目

.The construction of the new building will cost ______ 1,000,000 dollars, and it’s not easy to get so much money.a. at last b. at most c. at least d. at large 答案：C13．两个边数相同的多边形相似应具备的条件是（　　）A．各角对应相等B．各边对应成比例C．各角对相等，各边对应相等D．各角对应相等，各边对应成比例