【简答题】The food on the moon has come a long way from the freeze – dried bread to half – dried food. They have changed a lot in the past few years. And now US scientists want to grow vegetables in mini – gree...
【简答题】阅读理解。 Sometimes, people are not clear about what kind of food is healthy, and what kind of food may do harm to our health. The USDA has prepared a food guide to help people learn about which kind of f...