证券公司从事资产管理业务时，不得向客户做出保证资产本金不受损失或取得最低收益的承诺。( )
参考答案：对
Armed police and railway workers were removing snow from the track to _______ a train stuck near Jining in Inner Mongolia.
A．recover
B．free
C．protect
D．clear
钢丝带有哪些特点？
