【单选题】【消耗次数：1】
Anewtechnique______,theyieldsasawholeincreasedby20percent.
①
working out
②
having worked out
③
having been worked out
④
to have been worked out
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随机题目
【多选题】
根据《发挥好“显著优势”，坚持和完善党的领导制度体系，提高党科学执政、民主执政、依法执政水平》，造成国家失能、失位的原因有哪些？（）
①
组织不统一
②
政治不统一
③
思想不统一
④
军事不统一
⑤
文化不统一