下列文献哪个是二次文献？（）
A.文摘
B.会议文献
C.辞典
D.百科全书
参考答案：A
John told me that he had lost his key to the car, but he didn't really lose it-that's just a(an)________．[ ]
A．fool
B．event
C．performance
D．trick
对该患者诊断考虑为：球部 * * 断裂，但无尿外渗，应做哪项处理
A．耻骨上膀胱造瘘B．耻骨上膀胱穿刺造瘘C．留置导尿D．会阴血肿清除+ * * 断端吻合E． * * 会师
