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Middle School Laboratory(实验室) Safety Rules
Science is about discovering and exploring the natural world．Explorations （探究）can occur （发生）in the classroom，laboratory or field． As part of your science lessons， you will take part in many activities using many different materials， equipment and chemicals， which can be dangerous if not used correctly． As a result， you may be faced with biological（生物学的），chemical or physical hazards．
Safety is THE MOST IMPORTANT thing． The following safety rules have been developed for the protection and safety of everyone．
★Behave yourself in a responsible way at all times． Risky （危险的）behavior such as throwing things and doing experiments without teachers' instructions（指令） is not allowed．
★Eating， drinking， chewing gum（口香糖），wearing make﹣up（化妆品），touching contact lenses（隐形眼镜） or other unsafe activities are not allowed．
★Do not enter or work in the laboratory unless an instructor（教师） is present．
★Never enter areas where chemicals are kept．
★Taking any chemicals or equipment away from the classroom or laboratory is not allowed．
The safety rules must be followed at all times．Review these rules with your teacher and parents， then sign and get the signature（签名）of a parent． The signature shows that you understand the lab can be dangerous，and that you have read the rules and agree to follow them at all times． Signatures are needed before you can go on with any lab or science classroom activity．
（1）What does the underlined word "hazards" probably mean in Paragraph 1？
A． Illnesses．
B． Examinations．
C． Dangers．
D． Experiments．
（2）Which of the following might be allowed in the lab？
A． Drinking soda．
B． Wearing glasses．
C． Having breakfast．
D． Taking away chemicals．
（3）What should students do after reading the rules？
A． Sign to agree to the rules．
B． Get a teacher's signature．
C． Take a test on safety rules．
D． Go on with lab activities．
