【单选题】What are they doing ?
A.
They are taking photos.
B.
They are shooting films.
【单选题】What are they doing?
C.
They are shaking hands.
【单选题】What are they doing?
C.
They are takling a story.
D.
They go to the supermarket.
【单选题】what are they doing ?
A.
They are taking photos.
B.
They are cutting or editing films.
【单选题】What are they doing?
A.
they are taking photos
B.
they are cutting or editing films
【判断题】轴在车削中,同轴度要求较高的台阶面加工,一般用顶尖孔作为定位基准,咸少了几次转换装夹带来的定位误差
【单选题】What are they doing?
【单选题】Can you tell me ________?
A.
what are they doing that for
B.
why they are doing for
C.
why are they doing that
D.
what they are doing that for
【单选题】What are they doing?
A.
They are playing computer games
B.
They are playing Fun Facts