对推力轴承施行拆卸前和装配后,都不需要测量其推力间隙。
参考答案:错
He always looks _______. You can see his smile all the time.
A.happy
B.happier
C.happily
D.more happily
根据离渔业基地的远近和渔场水深,渔场通常可分为:()、()、()和()、远洋渔场。