下列不是集成运放的非线性应用的是（）。
A、积分应用
B、比较器
C、过零比较器
D、滞回比较器
参考答案：A
一根电话线15分米，6根这样长的电话线接在一起（不计接头处），长多少米？
— Let's give up. It's too late. I don't think any bus will come.
— I don't care. I'll get there ________ I have to walk all the way.
A． as if
B． so that
C．even if
D．now that
