阀杆和阀件制成一体,可较好调节启闭高度,从而调节好阀座通道面积,达到—定流量和压力,这种阀门是()。
A.节流阀
B.调节阀
C.平衡阀
D.减压阀
参考答案:A
Directions:This section consists of three groups of pairs listed in two columns, A and B. You are to match the one marked 1) ,2), 3 ) ,4) or 5) in Column A with the one marked a, b, c, d or e in Column B. One point is given to each pair you match. 1) ______ the Direct Method 2) ______ the Audiolingual Method 3) ______ the Oral Approach 4) ______ the Communicative Approach 5) ______ the Cognitive Approach a) cognitive psychology and transformational grammar b) Notional Syllabus or some other communicatively organized syllabus c) language acquisition and associationist psychology d) British "structuralism" e) structural linguistics
女性,68岁,慢性支气管炎、肺气肿12年。2天前剧咳后,突然感左侧胸痛伴呼吸困难,不能平卧,可能的诊断是()。
A.肺炎球菌肺炎
B.肺栓塞
C.心肌梗死
D.自发性气胸
E.结核性胸膜炎