当出现()需较正机针安装位置,更换缝线、针板、机针、增大压脚压力。
A、断针
B、断线
C、跳针
D、底面线均紧
参考答案:A
-- I know this is the latest type but it's secondhand. $20 -- that's my last offer.
-- OK. It's a(n) ___________.
A.business
B.trade
C.agreement
D.deal
提高蒸汽品质的途径有哪两种?