简述主动脉瓣及瓣上和瓣下狭窄常见原因及各收缩期杂音的特点。

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问题:

简述主动脉瓣及瓣上和瓣下狭窄常见原因及各收缩期杂音的特点。

考点:卫生知识健康教育知识竞赛心血管知识竞赛心血管知识竞赛题库
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Do you have lunch ________ school?[ ]

A. to        

B. in        

C. at       

D. on 

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较大囊肿或囊肿位于肾盂肾盏附近可出现肾盂肾盏变形、移位、拉长或缩短、扩大等类似于其他占位病变的表现,但不引起肾盂肾盏的破坏()

A.肾梗死

B.肾囊性病变

C.肾恶性肿瘤

D.肾脓肿

E.肾良性肿瘤

题型:问答题 简答题

词汇运用,根据句意,用括号中所给词的正确形式填空,每空填一词

小题1:Nowadays driving after drinking wine is      the law. (违反)

小题2:The plan is still under        (讨论) .

小题3:More and more robots        (控制)by computers can do difficult work in many dangerous places .

小题4:By comparing        (you ) with others , you’ll find your problems are so terrible.

小题5:There’re many students playing on the playground . Two        (3) are boys.

小题6:We like Miss Gao because she can make her lessons l       and interesting.

小题7:She spent much time        (解释) the problem.

小题8:He arrived at last ,      (呼吸) heavily.

小题9:The lazier you are , the        (少) progress you’ll make .

小题10:She asked me if I knew those        (导演) names

小题11:S        , more and more wild animals  are disappearing .

小题12:In spring , many diseases can be easily         everywhere by some animals .(传播)

小题13:Reading is a way to bring us much        (please ).

小题14:Before        the office , you should knock on the door first .(enter)

小题15:Lei Feng is         as a hero . (认为)

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X线胶片中感光物质是哪一组物质

A.溴化银
B.氯化银
C.溴化银+碘化银
D.碘化银
E.氟化银

题型:问答题 简答题
如图所示,理想变压器原副线圈匝数之比为4:1,原线圈接入一电压为u=220sin100πtV的交流电源,副线圈接一个R=27.5Ω的负载电阻.则下述结论正确的是(  )

A.副线圈中电压表的读数为55V

B.副线圈中输出交流电的周期为0.01s

C.原线圈中电流表的读数为0.5A

D.原线圈中的输入功率为110W

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