单选题：First published in 1927, the charts remain an ________ sourc

题目内容：

First published in 1927, the charts remain an ________ source for researchers. A．identical
B．indispensable
C．intelligent
D．inevitable

参考答案：

答案解析：

受吊销医师执业证书行政处罚，自处罚之日起不满二年的（　　）

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