第24题:[单选题] When it is accepted to remain on the frequency indicated, you should say ______. A. Standing by on VHF frequency B. Coming to VHF frequency C. VHF frequency … the best place for you to stay by D. remain in frequency … and do not change 参考答案:A 【参考译文】当同意保持在所示频率上时,你应说正在VHF频率上守听。 【解 析】stand by此处为守听之意。
第25题: [单项选择]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3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 参考答案:E