题目

阅读短文,选择最佳答案。 Dear Peter, I know that you are coming to Hangzhou next week. Welcome to my home. Let me tell you the way to my house. You will live in Changjiang Hotel on Changjiang Street, won’t you? OK! Changjiang Street is a famous and busy street in our city. You can start from your hotel and go straight along Tongcheng Street. You pass two small streets: Hongxing Street and Lujiang Street. When you see an overbridge(高架桥), please turn right and go along Huangcheng Street. It’s an old street, but it’s clean. There’s a big park on the street. It’s b用保鲜袋包裹的新鲜蔬菜比不包裹的新鲜蔬菜保存时间长的原因是（　　） A、降低了蒸腾作用B、降低了呼吸作用C、减少了损伤D、保持了温度