The modern machine proved ______ in heart surgery.
举一反三
- Cardiac surgery started with “blind-heart” surgery.
- He had_____________ (幸存) heart bypass surgery.
- Double-entry system is considered as the heart of modern accounting.
- 脊柱手术的微创化有助于减少手术带来的损伤。(The minimally invasive spinal surgery helps reduce the damage caused by surgery.)
- 2.He__________to me how the machine was used. A: showed B: said C: proved D: explained