【单选题】Wilbur consumes only apples and bananas. He prefers more apples to less, but he gets tired of bananas. If he consumes fewer than 18 bananas per week, he thinks that one banana is a perfect substitute ...
【简答题】Everybody wants to be healthy. You know food is very important. There are many healthy foods. You can have more bananas, apples, oranges, tomatoes and lettuce(莴苣) because fruits and vegetables are goo...