第3题: [单项选择]______, the guest speaker was ushered into the auditorium hall to give the lecture. A. Being shown around the campus B. Having shown to the campus C. After been shown around the campus D. Having been shown around the campus 参考答案:D 答案解析:[解析] 因为在was ushered in to the auditorium hall之前就发生了be shown around the campus这一动作,所以应该用完成时的被动语态。D项为正
第5题: [单项选择]关于抗毒素的使用,错误的是() A. 可作为免疫增强剂给儿童多次注射 B. 治疗时要早期足量 C. 可能发生过敏反应 D. 对过敏机体应采取脱敏疗法 E. 只能用于紧急预防或治疗 参考答案:A 答案解析:抗毒素是用细菌外毒素或类毒素免疫动物而制备的免疫血清,具有中和外毒素的作用。抗毒素多为马血清,该制剂对人而言属异种蛋白,反复多次使用可能引起超敏反应。
第30题: [单项选择]Kerbside recycling programmes in America A. always generate less revenue than they spend. B. usually generate less revenue than they spend. C. usually generate more revenue than they spend. 参考答案:B
第31题: [单项选择]口对口人工呼吸,下列哪项错误 A. 操作者深吸一口气,对准病人口部呼出 B. 吹气时捏紧病人鼻孔 C. 首先必须保证呼吸道通畅 D. 最适合于现场复苏 E. 若操作正确,病人PaO2可达75mmHg,SaO2高于90% 参考答案:A