【简答题】A school class is made up of 20 males and 30 females. There is an outbreak of measles in the class. Four children have measles——eight males and six females. Then the proportion of measles cases th...
【简答题】根据你听到的对话内容,选择正确的答案。 ( )1. A. Class 8 ( )2. A. Her name is Nancy. ( )3. A. A school with many things ( )4. A. Two weeks. ( )5. A. Very much. ( )6. A. Maths B. Team 8 B. It's in ...