—Can I have some French fries? — .[ ]
A. OK. Here you are
B. Thank you
C. Thanks
答案:A
刀具刃磨后,刀面越平整,表面粗糙度越小,刀具寿命越长。
汽油机的燃烧过程分:着火延迟期,明显燃烧期,和补燃期()