大修后的车轮内侧距应是（）mm。
参考答案：1353±2
There are some _______ in our city. We can read books, newspapers and magazines in them. [ ]
A. animals
B. libraries
C. airports
D. banks
工作面因瓦斯超限而切断电源的电气设备，都必须在瓦斯浓度降到（）以下，方可复电开动设备。
A、0.5%
B、1.0%
C、1.5%
