The country has been in a very poor ____ (economy) state ever since the decline of its two major industries.
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选词填空,必要时改变形式:stimulateavailableabundantgreedycharitysubconsciousuniversereadily
水轮机进行能量转换的核心部件是
A. 蜗壳
B. 导水机构
C. 转轮
D. 尾水管
混流式水轮机是由蜗壳、座环、导水机构、转轮和尾水管组成的整体,因此而得名
A. 对
B. 错