单元检测（五） A Lesson in a Lab

　　Ⅰ.阅读理解

　　A

　　Being in the school's science lab can be exciting, because you're doing something different from sitting at your desk listening to your teacher. But fun as lab work is, you have to observe the safety rules if you don't want to hurt yourself or your lab partner.

　　The first rule is to behave responsibly in the laboratory at all times. When your teacher is showing you lab equipment, listen to what he is telling you, because some of the equipment can be dangerous.

　　Become familiar with your lab assignment (任务) before you start doing it. This means reading everything the teacher has written down and asking questions if you don't understand an instruction or a term.

　　Do not try to work alone. If your partner is absent, let your teacher know so she can assign another student to work with you. And don't do any other experiments other than what you have been assigned. Wear your lab apron (围裙) and safety goggles (护目镜) whenever you are working on a lab assignment. On lab days, wear old clothing that you won't mind getting damaged. Make sure this clothing covers as much of your skin as possible. Keep your hands away from your skin, face, eyes and mouth when you are working with dangerous chemicals.

　　You will be working with fire in the lab with an alcohol lamp. Use gloves when handling hot lab equipment. If you have long hair, pull it back in a ponytail (马尾辫) and roll up long sleeves. Don't put paper, chemicals, lab equipment or any part of your body in the flame.

　　When you use a sharp instrument, treat it with care. Do not point it at yourself or any one of your fellow classmates during the experiment.

　　语篇解读：在实验室做实验很有趣，但也处处存在危险。因此，遵守实验室的安全规则是很有必要的。

　　1．If you don't follow the safety rules, you will probably ________.

　　A．be laughed at　　　　　　 B．lose your life

　　C．hurt yourself D．fail in the experiment

解析：选C　细节理解题。整篇文章都在告诉我们，如果不遵守安全规则，就有可能受伤。