进口货物应当自运输工具申报进境之日起21天内向海关申报。超过上述规定期限未向海关申报的，由海关征收滞纳金。（）
参考答案：错
As we have known from the map of the woad, this is ______.
A．twice as large an island as thatB．twice as larger as that islandC．as twice as that oneD．twice as a large island as that
交联聚乙烯绝缘电缆在长期运行中，周围化学溶液渗入电缆内部，与金属发生化学反应，形成有腐蚀性硫化物，最终导致绝缘击穿的现象，称为（）。
A.电化树枝
B.电树枝
C.水树枝
