金属材料不纯便具备发生电化学腐蚀的（ ）的条件。
A、金属内部有电流B
暂无解析
In some countries around the world men and women tend to have their children late in life. What are the reasons for this development? What are the effects on society and family life?
由于不可抗力原因，导致包舱运输合同不能履行，承运人不承担责任。
We wish to express our desire to trade with you in leather shoes.
Student or work?
.For the sake of our long-term friendship ,we are going to accept the price reduction on the radios. How about 6% off?
