The declaration of import goods shall be made to the Customs by the importer within （） days from the date of the declaration ot the arrival of the means of trans port.

A. seven days

B. fourteen days

C. fifteen days

D. thirty days

用干细沙壤土灌缝后，再沿裂缝修筑（）压住缝口，以防雨水浸入。

A.反滤层

B.黏土埂

C.沙子埂

D.沙土埂