理论上讲预焙槽的炉帮是通过()形成和维持的,自焙槽炉帮是通过()形成和维持的。
参考答案:侧部散热;氧化铝的溶解
_________ in Current Biology, the finding suggests that female birds seek mates with superior singing skills.
A.To publish
B.Published
C.Having published
D.To be published
已售未提的商品是企业为了提高顾客服务所造成的必然成本,但需要尽快清理,否则将占据大量仓库资源。()