牺牲阳极与钢铁相连时，（）首先失去电子。
A、钢铁
B、牺牲阳极
C、导线
D、填包料
参考答案：B
In accordance ____________ the terms of payment as stipulated in the contract, please establish an irrevocable letter of credit in our favor.
我国农村社会现代化的特征有()。
A．缓慢的发展
B．不平衡
C．不协调
D．问题多
E．理论性差
