尽管逆向物流具有极大的不确定性，但通过信息技术的应用，可以帮助企业提高物流的效率和效益。
参考答案：对
Look and write. （根据图示补全句子）
1. I ____ songs in the KTV yesterday.
2. Mary ____ a boat in the lake last Sunday.
3. My mother ____ my room yesterday afternoon.
体重
I ____ songs in the KTV yesterday.
Mary ____ a boat in the lake last Sunday.
My mother ____ my room yesterday afternoon.