Which of the following safety precautions must be taken when working in a laboratory? Select all that apply.多项选择题

A

Wear close-toed shoes and a lab coat at all times to protect yourself from spills and contamination.

B

Clearly label any food that is brought into laboratory areas as for human consumption only.

C

Be sure to clean up yourself any and all spills that you may have inadvertently caused.

D

Always wash your hands before leaving the laboratory at the end of the class period and whenever you exit the lab.

E

Never bring biological materials outside of the lab without proper secondary containment.

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