In daily life，we often use body­language

炊水污染可引起的传染是

A．钩端螺旋体病

B．伤寒

C．乙型肝炎

D．霍乱

E．甲型肝炎

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When it was his turn to speak, ________ ,  he stood up.   [ ]

A. nervously and excited  

B. nervous and excitedly 

C. nervously and excitedly  

D. nervous and excited

以下哪项是左心室扩大的X线征象()

A．正位上右心缘双边或双房影

B．正位上左心缘第三弓突出

C．右前斜位食管压迹加深

D．右前斜位胸骨后间隙缩小

E．左前斜位心后下缘膨隆突出

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