20171201CET-4 Listening comprehensionSection C 18
A: They are extremely accurate.
B: They are expensive to make.
C: They were first made in space.
D: They were invented in the 1970s.
A: They are extremely accurate.
B: They are expensive to make.
C: They were first made in space.
D: They were invented in the 1970s.
举一反三
- 18 A: They are extremely accurate. B: They are expensive to make. C: They were first made in space. D: They were invented in the 1970s.
- 20171201CET-4 Listening comprehensionSection C 20 A: They believed in working for goals. B: They enjoyed living a living a life of ease. C: They had all kinds of entertainment. D: They were known to be creative.They were known to be creative.
- 20171201CET-4 Listening comprehensionSection C 17 A: They accurately calculated the speed of the orbiting shuttles. B: They developed objects for astronauts to use in outer space. C: They tried to meet astronauts' specific requirements. D: They tried to make best use of the latest technology.They tried to make best use of the latest technology.
- If computers ______, many problems on space flight could not have been solved. A: had not been invented B: are not invented C: were not invented D: have not invented
- The enemy ______ trouble.(1.0) A: constantly make B: were constantly making C: were making constantly D: were being made