最早的教学手段是（） ["A、实物","B、人自身的活动","C、说教","D、标本"]
肢口纲动物的呼吸器官是（）。? ["A、书鳃","B、书肺","C、肢鳃","D、外套膜形成的“肺”"]
多尿、少尿及无尿的标准分别为（ml/24h）（） [">3000ml、<4000ml、<17ml",">2500ml、<400ml、<100ml",">2000ml、<1000ml、<100ml",">2500ml、<500ml、无尿","2500ml、<100ml、<50ml"]
甲壳动物的排泄器官是（）。? ["A、触角腺","B、基节腺和触角腺?","C、基节腺和颚腺","D、颚腺和触角腺"]
镜下血尿的诊断标准，应为尿沉渣镜检，每高倍视野大于多少只红细胞（） [">5只",">4只",">10只",">3只","满视野"]
电气工具和用具使用前应注意什么？
