What is the author's view of "instant" scientific discoveries
A: They occur with long intervals.
B: They occur in quick succession for a long period.
C: They require long periods of time to be confirmed.
D: They are never made easily, but through long years of intense work and persistence.
A: They occur with long intervals.
B: They occur in quick succession for a long period.
C: They require long periods of time to be confirmed.
D: They are never made easily, but through long years of intense work and persistence.
举一反三
- "Diseconomies of scale" occur in ( ) A: the long run, but not the short run. B: the short run, but not the long run. C: both the short run and the long run. D: neither the short run nor the long run.
- 1.I haven’t seen him for _____ that I’ve forgotten what he looks like. A: so a long time B: such a long time C: such long time D: so long time
- That was long ago. A very long time ago. Almost 30 years ago.
- I haven't seen her for ( ) . A: such long time B: so a long time C: such a long time D: so a long time
- It was quite a long time I made out what had happened.