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