单项选择题
GW4-25/630T与GW4-25/630TD为电气化铁道专用耐污型隔离开关，额定电压为（ ）kV
A、10
B、25
C、27.5
D、55
GW4-25/630T与GW4-25/630TD为电气化铁道专用耐污型隔离开关，额定电压为（ ）kV
A、10
B、25
C、27.5
D、55
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单项选择题
In place of reasons, for a profile story, a reporter must find out about the subject’s ________.
In place of reasons, for a profile story, a reporter must find out about the subject’s ________.
A．Recent achievement
B．Values and standards
C．Opinions and thoughts
D．None of the above.