问题
判断题
| 我是小法官，我来判断正(T)误(F)。 | |
| ( ) 1. Look,this is a girl in front of the desk. ( ) 2. What are these? They're two chairs. ( ) 3. The book is on the desk. ( ) 4. A cat is under the desk. ( ) 5. Where's the pen? It's behind the desk. |  |
答案
1. F 2. F 3. T 4. T 5. F
，则体系的动力系数为（）。