第6题: [单项选择]The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished. A. had they been done B. they had been done C. having been done D. they were done 参考答案:A 答案解析:虚拟语气题。这是一句虚拟语气的句子,条件句使用了省略if的倒装句形式,动作与过去事实相反。
第12题: [单项选择]关于心肺脑复苏的原理,描述不正确的是()。 A. 心泵机制是胸外按压的原理之一 B. 胸泵机制是胸外按压的原理之一 C. 电除颤的瞬间心肌同时去极化,终止了异位兴奋灶及折返环,所有心肌细胞均处于不应期 D. 目前脑复苏的治疗关键为调节内环境和代谢紊乱 E. 心肺复苏后,缺血后再灌注所导致的一系列病理生理改变会进一步加重全脑损害 参考答案:D