设置在潮湿环境或有化学侵蚀性介质的环境中的砌体灰缝内的钢筋应采取防腐措施。
参考答案：对
亨廷顿病患者的CAG拷贝数越多应是下列哪一种病情（）
A.发病年龄越早，临床症状越轻
B.发病年龄越晚，临床症状越重
C.发病年龄越早，临床症状越重
D.发病年龄越晚，临床症状越轻
E.发病年龄越晚，死亡越早
In case Customs duties are short-levied or not levied on import or export, the Customs may, within ______ after the date of payment of Customs duties or the date of release of the goods, recover the amount of Customs duties short-levied or not levied.
A．six months
B．one year
C．two years
D．four years
