There is really no evidence from scientific studies that vitamin C can lower the incidence of the common cold, or prevent it in the first place.
举一反三
- 20. Broccoli _____, can prevent the human body from being damaged by oxidant environment . A: is rich in vitamin C B: rich in vitamin C C: be rich in vitamin C D: are rich in vitamin C
- A scientific hypothesis can only be ______ by indisputable facts ,i.e. , by evidence derived from actual observation and experiment. A: claimed B: exposed C: continued D: confirmed
- Evidence obtained from observation and experiment is often used to _____ a scientific theory.
- Since 1970, millions of enthusiasts ( ) Vitamin C, which they believe can remedy the common cold.
- 5.Choosing a topic that you are familiar with and really interested in would ensure a successful speech in the first place.