【简答题】The nose is important for everyone. It can help a person breathe and smell. In fact,it can also be used in many popular expressions. Some people can lead other people by the nose. For example, if a wi...
【单选题】Mike and Sandy are two woodworkers who both make tables and chairs. In one month, Mike can make 4 tables or 20 chairs, where Sandy can make 6 tables or 18 chairs. Given this, we know that the opportun...