我国香猪的产地主要是在( )。
A．贵州
B．河北
C．山西
D．辽宁
参考答案：A
It is important that we _______with all that _______ in the struggle.
A．should unite, be united
B．would unite, can be united
C．unite , can be united
D．should unite, could unite
RH添加合金时，硅铁的加入量不超过循环流量的（）%。
A.1.5
B.2-4
C.2
D.4
