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单选题
1090. While you do each step of the valve test,make sure that there is no leakage Calculate the quantity of fuel necessary
A
As you do the valve test, make sure that there is no leakage. Assess the quantity of fuel needed.
B
While you do each step of the valve test, make sure that there is no leakage. Concern the quantity of fuel necessary.
C
As you do the valve test, make sure that there is no leakage. Release the quantity of fuel needed.
答案解析
正确答案：A
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