A. It has appeared since 1960. B. It is an electronic brain and can store a lot of information. C. It is a chip of silicon crystal and is very small. D. It becomes cleverer and more expensive every year. 参考答案:D 答案解析:根据文章第四段,芯片变得越来智能,体积越来越小,却越来越便宜。因此,D项的阐述不正确。
第15题: [单项选择]胆囊显影脂肪餐后,显示胆道较好的摄片时间为 A. 3~10min B. 10~15min C. 15~30min D. 30~45min E. 60~120min 参考答案:C 答案解析:在脂肪餐后15~30min摄片可清楚显示胆道,30~60min摄片可观察胆囊收缩和排空情况。
第24题: [单项选择]肺衰伴心衰者可见()。 A. 气息喘促,张口抬肩,口唇爪甲青紫,高热烦躁,口渴便秘 B. 声短息微,倦怠但欲卧,四肢逆冷,少气懒言 C. 喘促短气,语言无力,咳声低微,自汗畏风,面色苍白 D. 心悸,喘促不能平卧,烦躁,咳吐粉红色泡沫样痰 E. 气息急促,喉中水鸡声,无咳嗽咳痰,每春季花盛之时多发 参考答案:D