An American employer is likely to use a worker's family name when ______. A: the worker is to get a promotion B: the worker has done something wrong C: he speaks to the worker at a gathering D: he is being friendly with the worker

According to the newspaper, more than one worker______ dismissed in this economic depression. A: have been B: are C: has been D: has

Unskilled office worker and skilled well-paid manual worker belong to upper middle class.

Choose the appropriate description for a worker ( ). A: A worker is a person who is doing mental job. B: A worker is a person who is prone to devote more time to working. C: A worker is a person who feels happier and more satisfied with his/her life. D: A worker is a person who spends his/her leisure time on lifelong learning.

Which of the following is not a blue-collar worker? A: plumber B: electrician C: attorney D: structural worker

Spark任务调度过程是什么？（） A: RDDObject->ADGScheduler->TaskScheduler->Worker B: ADGScheduler->RDDObject->TaskScheduler->Worker C: RDDObject->TaskScheduler->ADGScheduler->Worker D: Worker->ADGScheduler->TaskScheduler->RDDObject

He must be a worker,  _______________ ?

You are not a worker, right?

She was a ______ worker for charity.

A person is a worker if he __________.