章节大纲

  • 常规

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  • 安全危险

    Read this on Safety Hazards. You are on slide 1. There are 5 slides to read. Use 

    lesson content
    to read slides 2,3,4, and 5.
    ::在“安全危险”栏阅读。您在幻灯片1中,有5张幻灯片需要阅读。使用来阅读幻灯片2、3、4和5。

     

     

     

     

     

     

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    1.

    What is he doing?
    ::他在干吗?

     

    a

    He is falling.
    ::他掉下来了

    b

    He is climbing.
    ::他正在攀爬。

    c

    He is using machinery.
    ::他正在使用机械。

    d

    He is using electricity.
    ::他在用电