Safe Laboratory Practices Which safe laboratory practices should be observed before commencing any work in the laboratory? Select all that apply.多项选择题

a. Your TA is present.

b. Another student is present in the lab.

c. Your bag is on the shelf underneath the bench.

d. Safety glasses are on, even if you already wear glasses.

e. You are wearing sandals.

f. Laboratory coat is on, and buttoned up.

g. You are wearing fully-enclosed shoes, with good soles.

h. Long hair is tied up.

i. Safety glasses are on, unless you wear glasses.

j. Your bag is on the bench.