最简单有效的方法是
A．血常规B．尿常规+尿培养C．X线光片D．排泄性尿路造影E．CT怀疑尿路结石病人为进一步明确诊断
参考答案：C
Great changes have taken place in that factory. It is no longer _________
it was 20 years ago,_____ it was so poorly equipped.
A．what ,when
B．that ,which
C．what ,which
D．which ,that
易侵犯中枢神经系统的白血病（）
A.急性粒细胞性白血病
B.急性单核细胞性白血病
C.急性早幼粒细胞性白血病
D.急性淋巴细胞性白血病
E.慢性粒细胞性白血病
