英语口语900句 10.03.对话.3.在实验室

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teacher:Good afternoon,everyone. This experiment¹ is to start at 3 o'clock. Have you gone to the instructions²?

student:Yes,Sir.

teacher:Ok. Now,some points for attention³. First of all,pay attention to safety⁴. Now,sign your name on the lab⁵ record⁶. And after that you can start. Is there any question just let me know.

student:Excuse me,Sir. This air compressor doesn't work.

teacher:Have you turned it on?

student:Yes,I have.

teacher:Ok,I'll give you another one.

student:Thank you.

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