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【判断题】
如图所示正弦交流电路中，电流表A1的读数是5A，电流表A3的读数是4A，则电路中电流表A2的读数是1A。（ ）【图片】A.
正确
B.
错误
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【单选题】患者张某,腹部查体见腹壁浅静脉曲张,脐以上血流方向由下至上,脐以下血流由下至上,该患可能是下列哪种情况
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【单选题】诊断胎儿窘迫的胎儿头皮血PH值应为