18.The new drug will not be put on the market ____ it has proved safe on humans.
举一反三
- The new drug will not be put on the market______ it has proved<br/>safe on humans. A: if B: until C: since D: when
- It is the responsibility of the company seeking to market a drug to test it and submit evidence that it is safe and effective.
- It has not been ______ that this drug is effective against the new type pneumonia.
- It has been proved that the chemical islethalto rats but safe for cattle. A: fatal B: reactive C: unique D: vital
- According to God, what’s the source of the great power for humans to construct the Tower of Babel A: The intelligence of the humans. B: The experience of the humans. C: The common language of the humans. D: The aspiration of the humans.