Anne _____ the news to everyone.
A. told
B. said
C. talked
D. spoke
All the passengers were killed in the air _____ except the airhostess, who survived it only to die of hunger and thirst in the desert.
A. crash
B. smash
C. clash
D. crisis
黏性土的膨胀性通常用下述()指标表示。()
A. 膨胀率
B. 膨胀力
C. 膨胀速度
D. 膨胀含水率
关于光气安全的描述正确的有____。
A. 光气冷凝器尽量多采用空冷器以降低单耗
B. 高浓度液态光气管线应采用夹套管设计
C. 光气管线及设备连接宜采用丝接
D. 光气化区应按照规范进行相应的密闭处理