Students must comply with general conduct requirements. Which of the following are correct? You may choose more than one.多项选择题
A
Eating, drinking, smoking and the chewing of gum are not permitted in any laboratory
B
When first entering a student laboratory, do not touch any equipment, chemicals, or other materials in the laboratory area until you are instructed to do so.
C
Follow all written and verbal instructions carefully. If you do not understand a direction or part of a procedure, ask the instructor before proceeding.
D
You are expected to behave in an appropriate and professional manner at all times in the laboratory.
E
All of the above
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