训练方法只有与训练对象，才能提高（），保证训练效果。
A.训练质量
B.实战能力
C.综合素质
D.训练积极性
参考答案：D
Software Engineering Economy is an effective part of software engineering. Which of the following content is the research content of software engineering economy Ⅰ. Estimation of software development cost Ⅱ. Earn & Cost analysis of software development Ⅲ. Adjustment of software development progress
A．Ⅲ only
B．Ⅱ and Ⅲ
C．Ⅰ and Ⅱ
D．all
对慢性阻塞性肺疾病的诊断有重要意义的是（）
A.慢性咳嗽、咳痰的病史
B.查体可见桶状胸
C.胸部X线片示肺透亮度增加、肺大泡
D.血气分析：pH降低，二氧化碳分压增高
E.肺功能：第一秒用力呼气量/用力肺活量（FEV1/FVC.＜70%
