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单选题
Assure the avionics ventilation system continues to operate correctly.
A
Make sure that the avionics ventilation system continues to operate correctly.
B
To make sure avionics ventilation system is in a good condition, the check should be carried on all the time.
C
The avionics ventilation system is inoperative for a while then return to normal operation.
答案解析
正确答案：A
