能抑制或减轻混凝土中钢筋和其他金属预埋件锈蚀的外加剂是()
A.防水剂
B.阻锈剂
C.膨胀剂
D.泵送剂
参考答案:B
I don’t think that the necklace is made of diamond, ________?
A.do I
B.do you
C.isn’t it
D.is it
候选关键字的属性可以有
A.0个
B.1个
C.1个或多个
D.多个