与长江干流相交的重要铁路干线有[ ]
A．京广线、京九线、沪杭线
B．京广线、京包线、陇海线
C．京广线、京九线、京沪线
D．京九线、京包线、浙赣线
答案：C
A new to teaching languages is being used here, and it has turned out to be very helpful to the students.
A．approach
B．means
C．method
D．way
金融衍生产品有极强的派生能力和高度的杠杆性。（）
