土壤腐蚀
参考答案:
埋在土壤中的金属及其构件的腐蚀。
--I don't think we have met before.
--Yes, once at a party, but we___________.
A.weren't introduced
B.didn't introduce
C.haven't introduced
D.were not introducing
资本公积的主要用途是转增资本。()