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单选题
The SOV has a manual override capability which permits the valve to be opened or closed in case of failure of the electrical control.
A
The SOV has a manual override capability, so we can open or close the electrical control.
B
If the electrical control is faulty,we still can open or close the valve by manual method.
C
If the electrical control is fault, we still can open or close the SOV by manual method.
答案解析
正确答案：B
