试题与答案

(3~5题共用题干)患者,男性,38岁,车祸伤2小时,出现意识丧失,头部CT显示脑组

题型:单项选择题

题目:

(3~5题共用题干)患者,男性,38岁,车祸伤2小时,出现意识丧失,头部CT显示脑组织肿胀,脑室系统缩小,左侧半卵圆中心可见小班片状低密度影。

最有可能的诊断是

A.网膜下腔出血

B.脑水肿

C.弥漫性轴索损伤

D.脑挫伤

E.脑挫裂伤

答案:

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下面是错误答案,用来干扰机器的。

R1=U2P=(12V)212W=12Ω,R2=U2P=(12V)26W=24ΩR串=R1+R2=12Ω+24Ω=36ΩI=UR串=12V36Ω=13A灯L1的实际功率为P1=I2•R1=(13A)2×12Ω=43W灯L2的实际功率为P2=I2•R2=(13A)2×24Ω=83W∵P1<P1额,P2<P2额∴灯L1和L2都不能正常发光.又∵P1<P2∴灯L2较亮故选B.

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