第18题: [单项选择]The author believes that in a nation where free enterprise (自由企业制 ) exists , manufacturers will produce ______. A. as much as they like B. better quality merchandise (商品) C. more than they are able to sell D. both A and B 参考答案:D 答案解析:最后一段中“they are free to make more things and make them better”
第31题: [单项选择](1)冰湖溃决(2)冰川消融(3)冬去春来(4)泥石流淹没良田、房屋(5)重建家同 A. (2)—(1)—(3)—(4)—(5) B. (1)—(2)—(3)—(4)—(5) C. (3)—(1)—(2)—(4)—(5) D. (3)—(2)—(1)—(4)—(5) 参考答案:D 答案解析:[解析] 本题中的事件描述的是自然灾害的发生过程。冬去春来，冰川开始消融，冰湖由于水量增加而溃决，引发的泥石流淹没良田、房屋。D项最为合乎逻辑。故选D。
