Under the premise of technological production, preventive maintenance should be carried out at least twice a year to master the operating status of the system and eliminate the hidden trouble.

2022-06-06

答案：

对

0
The factory has turned out ___. A: TV sets twice more this year than last year B: twice more TV sets this year than last year C: twice as many TV sets this year as last year D: TV sets this year twice as many as last year
1
Under __________, the consignment will at least be carried by two different modes of transport before it arrives at the port of destination.
2
I wonder what trouble he had ______ the plan. A: to carry out B: carrying out C: carried out D: with carrying out
3
If I don't get the assignment finished in time, I'll be __________. A: in trouble. B: troublesome C: out of trouble D: into trouble
4
Which of the following is NOT a valid advantage of coding systems? A: The ability to process data is improved by the use of a coding system B: Coding systems eliminate the risk of error C: Checks on data can be carried out more easily if a coding system is used D: Items of expenditure can be located more quickly if a coding system is in place