Word 5.0可以建立、修改及应用样式，但是不可以删除某样式。
参考答案：对
_________ the exact departure time, he missed his train.
A．Not be told
B．Having not been told
C．Not having told
D．Not having been told.
当闪蒸真空度达到-0.04MPa时向V10送酸，流量先控制在（）。
A、20-30m3/h
B、30-50m3/h
C、30-40m3/h
D、20-25
