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单选题
784、在紧急情况下, 可使用 F-43 燃油替代 F-34 和 F-40 燃油。
A
in an emergency, you can use fuel F-43 as an alternative to fuels F-34 and F-40
B
In an emergency, you can replace fuels F-43 with fuels F-34 and F-40.
C
in an emergency, fuel F-43 can be used as an alternate to fuels F 34 and F-40
答案解析
正确答案：A
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