This is what I think,
<span>Fingerprints on any objects or weapons used. Footage, Security / camera footage. And probably witnessess who can describe the person.</span>
Answer:
1.The equipment is broken by someone.
2.Firstly the liguid must be heated.
3.Safety glasses must be worn in laboratory.
4.Science competition is won by a very young student.
5.A brilliant scientist is Dr liu .( this 5 no ans might be wrong)
The answer is letter b informal definition
I think it's rotunda but don't hurt me if I'm wrong.
