(13 Down) What must this experiment have the potential to do, to be a ______ (有效的) scientific experiment?
举一反三
- We must do the experiment carefully ___Miss Liu told us. A: what B: since C: as D: while
- We have to do another experiment today, ____?
- What did Dr. Sasaki do when re-running her experiment?
- Before the drug is used on human beings, experts have to ______ dogs. A: be experimented B: experiment C: experiment with D: experiment on
- The experiment must be very____(help) to her.