应收账款质押授信业务质押率一般不超过（）。
A.60%
B.70%
C.80%
D.100%
参考答案：B
15．----Ken, , but your TV is going too loud.
-----Oh, I’m sorry. I’ll turn it down right now.
A．I’d like to talk with you
B．I’m really tired of this
C．I hate to say this
D．I need your help
基尔霍夫第一定律的表达式为（）。
A.ΣI=0
B.U=IR
C.U=E-IR
D.ΣE=IR
