It is reported that the ambassador together with the working staff______ kidnapped by a group of gunmen who _______ into the American Embassy in Iraq last night but the news is not yet confirmed by the US government.   [ ]

A. was; burst  

B. were; went  

C. was; entered  

D. were; made their way

浓缩塔内负压波动的处理措施有（）。

A.及时调整中压蒸汽的温度及压力

B.调整循环冷却水的流量及压力

C.检查塔尾水泵的出口压力

D.如果系统泄漏要及时堵漏，必要时停车处理