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【多选题】
计时观察法用于建筑施工中时以现场观察为主要技术手段，所以也称之为现场观察法，其具体用途包括（ ）。A.
研究减少工时消耗的潜力
B.
取得编制施工的劳动定额和机械定额所需要的基础资料和技术根据
C.
研究定额执行情况
D.
研究组成部分较少而且比较稳定的施工过程
E.
研究先进工作法和先进技术操作对提高劳动生产率的具体影响，并应用和推广先进工作法和先进技术操作
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举一反三
【单选题】The prisoner ____ to escape but failed.
A.
arrested
B.
attacked
C.
attended
D.
attempted
【单选题】What' s the end of the story?
A.
The prisoner stole the policeman' s notebook and gave it to Mr. Green in return.
B.
The prisoner was caught.
C.
The prisoner robbed Mr. Green.
D.
Mr. Green sent the prisoner to the police station.
【简答题】The prisoner of war wished to be _________ Ten years later, he _________ free and regained his _________.
【简答题】It is thought that the prisoner escaped by climbing over the wall. (think)
【单选题】For many years the poor woman was a virtual prisoner in her own home.
A.
a real prisoner
B.
a prisoner by law
C.
an unreal prisoner
D.
in effect a prisoner
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