期货交易结算所是所有交易者的对手，也就是所有成交合约的履约担保者。( )
参考答案：对
使用丝锥夹头加工螺纹时应注意些什么？
Which emergency equipment should you keep near the towing bitts? （）
A.A self-contained breathing apparatus (SCBA)
B.A boat hook and a spanner wrench
C.A fire ax and/or cutting torch
D.A Stokes litter basket
