In the fusion reaction of elements formed in the universe, carbon nuclei can be directly generated from helium nuclei.
A: 正确
B: 错误
A: 正确
B: 错误
举一反三
- The pyramid is formed by A: pyramidal tract B: medial lemniscus C: cranial nerve nuclei D: non-cranial nerve nuclei E: inferior olivary nucleus
- Two electrons(电子) will be repelled from each other and so will two nuclei(原子核).
- Particulates may also be classified by their origin: . A: Primary—emitted directly from a process B: Secondary—subsequently formed as a result of a chemical reaction C: Smoke and fly ash from forest fires D: Pollens and other aeroallergens
- ___________, _____________, and _____________ directly use solar energy to produce organic molecules from carbon dioxide.
- Only in recent years have tools been available for investigating nuclei in any detail.