根据债券合约条款中是否规定在约定期限向债券持有人支付利息，可以将债券划分为()。

How could the previous breach of duty at BL be best described？

A．13 night shift workers were found playing cards 30 months ago.

B．13 night shift workers were found sleeping soundly 30 months ago.

C．8 night shift workers were found drinking alcohol three years ago.

D．8 night shift workers were found asleep two and a half years ago.

They worked ______ day and ______ night and were paid by ______ hour.

A．/,/,/

B．the,/ ,the

C．the,the,/

D．/,/,the

They worked______ day and______ night and were paid by______ hour.

A．/; /; /

B．the; /; the

C．the; the; /

D．/; /; the

What is implied but not stated in the passage is that in the past

A．blue-collar workers made a better living than white-collar workers

B．college and graduate schools trained more skilled workers

C．there were more white-collar workers than blue-collar workers

D．there were less white-collar workers than blue-collar workers

According to the passage, the main problem about night work is that ______.

A．people hate the inconvenience of working on night shifts

B．your life is disturbed by changing from day to night routines and back

C．not all industries work at the same hours

D．it is difficult to find a corps of good night workers

A．a smile

B．a sign

C．a request

D．a report

According to the passage, the main problem about night work is that______.

A．people hate the inconvenience of working on night shifts

B．your life is disturbed by changing from day to night routines and back

C．not all industries work at the same hours

D．it is difficult to find a corps of good night workers

Which of the statement is true？

A．Automation helps solve the problem of working at night.

B．A person can work more efficiently by frequent changes between day shifts and night shifts.

C．The adaptation to night work can be destroyed if the persons revert to their normal habits for even one day or two.

D．Those permanent night workers are more likely to have such symptoms as digestive disorder.