【多选题】独白式是导游人员讲述而游客倾听的语言传递方式,一般运用于导游人员()之中。
【简答题】在车床上车削一毛坯直径为40mm的轴,要求一次进给车至直径为35mm,如果选用切削速度υ c =110m/min。求背吃刀量a p 及主轴转速n各等于多少
【单选题】If I lived near my office, I ___________ (walk) to work.
【简答题】车一毛坯直径为60mm的轴,现要一次车削至直径为52mm , 如果选用切削速度 vc= 80m/ min , 求背吃刀量( ap ) 及车床主轴转速 ( n )各等于多少?
【判断题】一般情况下,根据选定的背吃刀量、进给量、刀具寿命T、工件材料、工件直径、刀具材料等,确定最大切削速度,再计算出机床主轴转速,取机床铭牌近似值。注意,由于切削速度对刀具寿命T有很大影响,如在精加工时,为避免中途换刀,因结合刀具寿命认真选择切削速度。
【单选题】If I you, I’d walk to work.
【多选题】当蒸馏塔的在全回流操作时,下列描述正确的是( )
【简答题】I
would like to take a walk outside ____________ after a whole day's work.
【单选题】Talia _____________ walk to work.
A.
I know. She lives nearby.
B.
I know. She lives too far away.