某男性患者经检查发现其Hb<130g/L、红细胞形态有明显低色素表现，医生结合其有明确的缺铁病因和临床表现情况，给予缺铁性贫血诊断。
参考答案：对
Great changes _______ in our country since 1990.
A．were taken place
B．took place
C．have taken place
D．have been taken place
血清前列腺特异性抗原(PSA)升高的是
A．肾癌B．肾母细胞瘤C．肾盂肿瘤D．膀胱肿瘤E．前列腺癌
