可以进行竣工验收的工程最小单位是( )。
A.分部分项工程
B.单位工程
C.单项工程
D.工程项目
参考答案:B
植入式左室辅助装置常见的并发症有()
A.血栓栓塞
B.出血
C.感染
D.溶血
E.右心衰
An analyst does research about the income elasticity of demand. As income rises from $500 per week to $1500 per week, the quantity demanded for a product increases from 1100 units to 1500 units. the income elasticity of demand is closest to:
A. 0.25B. 0.31C. 0.40