在企业规定的禁火区内，不准焊接。需要焊接时，必须把工件移到指定的动火区内或在安全区进行。（）
参考答案：对
He asked me_____. [ ]
A. am I a Party member or a league member
B. was I a Party member or a league member
C.if I was a Party member or a league member
D. whether was I a Party member or a league member
A．A′B′C′为省力杠杆
B．ABC为省力杠杆
C．两杠杆均为省力杠杆
D．两杠杆均为费力杠杆
