【简答题】果脯的护色除了有硫处理护色,常见的其他护色方法有_____、_____、_____、_____。
【简答题】听短文及问题,选择正确答案。 ( )1. A. Children's Day ( )2. A. new house ( )3. A. They are doing nothing ( )4. A. great ( )5. A. tired B. Christmas Day B. A new car B. They're some cakes. ...
【单选题】They're putting new street signs _____.