肺不张的范围可以是() ["A．一侧性","B．双侧性","C．肺叶性","D．肺段性","E．小叶性"]
Best病为常染色体显性遗传，________号染色体长臂有突变。
以下疾病中不形成瘢痕的是() ["A．脂溢性皮炎","B．寻常型痤疮","C．酒渣鼻","D．外伤"]
左下叶支气管的分支包括() ["A．背支","B．内支和外支","C．前内基底支","D．外基底支","E．后基底支"]
视网膜是由________层和________层组成。
视网膜完全缺血________分钟后出现不可逆损害。
