问题
填空题
机车的制动力主要由（）产生。
答案
参考答案：空气制动装置
搜题请搜索小程序“爱下问搜题”
机车的制动力主要由（）产生。
参考答案：空气制动装置
| 选词并用其适当形式填空。 | |
2. Tong is ______ tired ______ run. 3. I first ______ to a movie when I was five years old. 4. Shirley Temple ______ a movie star when she was three years old. 5. —How long did you hiccup? —I ______ for two weeks. |