允许速度不大于160km/h的线路，采用抛物线型竖曲线时，若相邻坡段的坡度代数差大于1‰，应设置竖曲线。
参考答案：错
The children were not allowed ________ the house because it was being painted .
A．entering
B．to enter
C．entered
D．enters
按现行政策规定，出口退税的税种有______。
A．所得税
B．增值税
C．营业税
D．消费税
E．个调税
