对阵发性房颤，发作时心室率不快且无症状患者，治疗考虑可采用（） A.暂不予治疗 B.

----Tony, why are your eyes red?

---I __ up peppers for the last five minutes.

A．cut

B． was cutting

C． had cut

D．have been cutting

填空题。

（     ）然失色　（     ）然大悟　（     ）然自得

（     ）然不群　（     ）然不同　（     ）然而生

（     ）然春意　（     ）然面对　（     ）然一笑

（     ）然不顾　（     ）然自乐　（     ）然有序

–Would you mind if I ______ here?

–______. It’s not allowed.

A．smoke; Yes, please

B．smoked; You’d better not

C．smoke; That’s all right

D．smoked; You are welcome

碳酸盐岩

接发列车时，发现货物装载状态有异状怎么办？