第28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35题: [单项选择]直流感应电刺激检查时呈部分变性反应的肌肉的典型表现为()。 A. 只对直流电反应弱 B. 只对感应电反应减弱 C. 对直流电和感应电的反应均弱 D. 对感应电反应弱,对直流电反应消失 E. 对直流电和感应电的反应均消失 参考答案:C 答案解析:直流感应电刺激检查时呈部分变性反应的肌肉的典型表现为对直流电和感应电的反应均弱。