在陡坡施工时，防止人身作业安全，严禁重叠作业，必要时应设（）设施防止（）。
参考答案：临时拦挡；落石伤人
The UK ________ Great Britain and Northern Ireland, is a country famous _____ its history.
A．consisted of, for
B．consisting of, as
C．consisting of, for
D．consisted of, as
什么叫平均氮纯度？
