In the past 50 years, there ________ a great increase in the amount of research _____ on the human brain.[1分]
举一反三
- In the past few years there (be)（）a great increase in the amount of research on the brain.
- What parts make up the human brain? A: Brain. B: Cerebellum. C: Interbrain. D: Brain stem.
- Most of the global warming observed over the past 50 years is attributable to human activities. ( )
- 5. The computer, which seems to play the role of a human brain, is often called an electronic brain.
- Great changes___ in the past ten years in China.