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  3. Choose THREE letters, A-G. Write your answers in boxes 7-9 on your answe

Choose THREE letters, A-G. Write your answers in boxes 7-9 on your answe

游客2025-02-17  30
问题     Choose THREE letters, A-G.
    Write your answers in boxes 7-9 on your answer sheet.
    Which THREE of the following seven pieces of safety equipment are suggested for use with a hot air balloon?
    A．Drop line
    B．Gas valve
    C．Piezo ignition
    D．Synthetic clothing
    E．Fire-proof gloves
    F．Flint spark lighter
    G．Propane combustion [br] Balloons must be checked annually according to ______.
选项
答案 international regulations
解析
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