IP承载网AR配置IS-IS协议，设置overloadtime为（）s，缺省600s。
参考答案：180
大量咳血的量是指（）。
A.一次咳血量超过50ml
B.一次咳血量超过100ml
C.一次咳血量超过300ml
D.一次咳血量超过500ml
E.24小时咳血量超过1000ml
Which of the following is true()
A. I took the medicine away.
B. The medicine is tasty.
C. I like the medicine anyway.
D. I ate the medicine.
