()不应锤击拆除。
A、引弧板
B、引出板
C、产品焊接试件
D、定位块
参考答案:A, B, C, D
—_______will you come back home from vacation?
—In two weeks.
A.How often
B.How soon
C.How much
D.How long
票据背书转让时,由背书人在票据背面签章、记载()和()。