男，52岁，体检胸片如图，最可能的诊断是()
A．肺不张
B．胸膜肥厚
C．包裹性积液
D．肺炎
E．气胸
参考答案：A
He ______ in Shanghai University for four years before he ______ Beijing.
A．studied, had gone
B．had studied, went
C．has studied, goes
D．had studied, had gone
投资决策过程中使用的非贴现评价指标主要有（）
A、净现值
B、现值指数
C、静态投资回收期
D、投资报酬率
