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Choose THREE letters, A-G. Write your answers in boxes 7-9 on your answer sheet. Which THREE of the following seven piec
Choose THREE letters, A-G. Write your answers in boxes 7-9 on your answer sheet. Which THREE of the following seven piec
admin
2012-01-16
67
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
Frequent ______ is important: fixing or changing faulty parts of the propulsion system when necessary.
选项
答案
maintenance
解析
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