一个圆锥的体积是20立方分米，底面积是15平方分米，它的高是______分米．

患者，女性，62岁，“慢性支气管炎、慢性阻塞性肺气肿”病史5年，本次因发热、咳嗽、咳痰，进行性呼吸困难加重入院。患者经治疗后病情好转准备出院，护士进行出院健康指导时告诉患者缩唇呼吸训练的目的是（）。

A.减少胸痛

B.减轻呼吸困难

C.增加肺泡通气量

D.避免小气道塌陷

E.提高呼吸效率

三次产业增加结构变化分析表

注：“六五”时期(1981年—1985年)、“七五”时期(1986年—1990年)、“八五”时期(1991年—1995年)、“九五”时期(1996年—2000年)

已知2000年我国的GDP为89404亿元，那么我国1996年—1999年四年的GDP总量约为（）

A．302761亿元

B．328974亿元

C．298716亿元

D．281479亿元

李某，32岁，右下后牙因龋坏严重已经作根管治疗，检查：右下6残根，叩诊(一)，无松动，X线片显示根充良好。该牙如要桩冠修复牙体预备时哪项是错误的

A．去除病变组织，尽可能保存牙体组织

B．颈缘不需做肩台预备

C．如近远中根管方向一致，可预备成平行根管

D．在不引起根管侧穿的前提下尽可能争取较长的冠桩长度

E．如髓腔完整，将髓室预备成一定洞型

关于三环类抗抑郁药物(TCAs)的副作用，以下哪项描述不对()

A．抗胆碱能副作用是TCAs治疗中最常见的副作用

B．TCAs可以诱发癫痫

C．TCAs的奎尼丁样作用可能与药物所致的心律失常有关

D．超量服用或误服可发生严重的毒性反应，危及生命

E．不引起变态反应

语法填空

      Seventyfouryearolds are 1.             most contented people in the world,according to a new research.

2．________ (few) responsibilities,financial worries and more free time lead to contentment previously

unknown in earlier life.According to the research,happiness 3.________ (decline) from the teenage years

to 40.It levels off until 46 and then starts to increase until peaking at 74.

      Scientists from Germany and America regularly questioned 21,000 men and women 4.________

happy they were with their lives,providing a scale from one to seven: seven indicated complete

contentment.Teenagers in their late teens marked themselves at around 5.5 which fell 5.________ around 5 by age 40.At 74,happiness averaged at 5.9.

      The report,6.________ (publish) in the journal Social Indicators Research,said this could be due to older people being more appreciative.

      It concluded,"Compared to younger individuals,older people tend to place a greater emphasis

7.________emotional aspects of social interactions and are likely to remember the emotional content of

their experiences."

      Bringing up a family,buying a house and 8.________ (create) a career add to the stresses experienced by those in 9.________ twenties and thirties.The change in happiness is apparently most obvious among

British people.The men and women 10.________ live in Germany have relatively stable levels of

satisfaction throughout their lives.