夹具的静载锚固性能由预应力夹具组装件静载锚固试验测定的()确定。
参考答案:夹具效率系数
雾凇与雨凇的外形特征、生成的条件有何区别?
While () an enquiry, you ought to enquire into quality specification and price etc.
A.making
B.offering
C.sending
D.giving