在压缩机总进气管前安装有(),用以净化造气工段带来的不洁气体,挡住管线中的各种异物,从而保护压缩机不受损害。
参考答案:进气过滤器
---Of ____ two bags, which one do you think is better?
--- _______ smaller one. I prefer how it looks.
A.the; The
B.the; A
C.a; A
D.a; The
影响食品中兽药残留的因素?