拖车的场内运输双行道宽度不得小于（）
A.5.0m
B.6.0m
C.7.0m
D.8.0m
参考答案：B
The new-designed car is on show now. I wonder _____.
A．how much it cost
B．how much did it cost
C．how much it costs
D．how much does it cost
人口老龄化是指65岁及以上老年人口系数大于
A．7.0%
B．6.5%
C．6.0%
D．5.5%
E．5.0%
