“物”从供给者到需求者之间存在有一段空间差,由于改变“物”的不同场所存在的位置,创造的效用,称做“时间价值”。
参考答案:错
His _____ to become a pilot was held back by his poor eyesight. [ ]
A. destination
B. inspiration
C. ambition
D. promotion
男性,66岁,排尿困难多年,现感会阴部疼痛3个多月,指肛检查触及前列腺表面不规则,行MRI检查,如图所示,你认为最可能的诊断是()
A.前列腺增生
B.正常前列腺
C.前列腺癌
D.前列腺钙化
E.前列腺出血