Numerical and computer control of machine tools ________ productions and improved the quality of product.
A: has greatly increased
B: have greatly increased
C: are greatly increasing
D: was greatly increased
A: has greatly increased
B: have greatly increased
C: are greatly increasing
D: was greatly increased
举一反三
- Computers have greatly increased ______ in business offices.
- The has been greatly increased this year in our office.
- Computers have greatly increased ________ in business offices. A: production B: product C: productivity D: produce
- ______ of the factory has greatly increased its productivity. A: Automation B: Automate C: Automated D: Automatic
- Computers have greatly increased ______in business offices. A: produce B: productive C: productivity D: producter