大学英语四级阅读技巧与训练
1. According to the passage the Jarvik-7 artificial heart proved to be ________. A) a technical failure B) a technical wonder C) a good life-saver D) an effective means to treat heart disease recall 召回,叫回,或召回之行为，尤指官方命令召回 的 cut into v.侵犯, 打断; 减少; 从中…占去时间 Key: A