输注避光药液时的注意事项？
参考答案：
应用闭光注射器抽取药液，并连接闭光延长管或用避光纸覆盖注射器。
It turned out that he had forgotten to ______ the lens cap and all the pictures he had taken thus failed to develop.
A．remove
B．delete
C．erase
D．detach
女性，61岁，尿与肾功能均正常，B超示双肾大小正常，伴有3个无回声占位，父亲85岁，双肾各有2个囊肿，母亲及弟弟B超双肾正常。最可能的诊断是（）
A.脓肿
B.肿瘤
C.结石
D.多囊肾
E.单纯性肾囊肿
