1．(2020·江苏卷)This actor often has the first two tricks planned before performing, and then goes for whatever.                                                                 技巧

2．(2017·浙江卷)Pahlsson and her husband searched the kitchen, checking every corner, but turned up nothing.                                                                          发现

3．(全国卷Ⅰ)In all, from the time the stem cells are harvested from a donor to the time they can be implanted in the patient, we've got 72 hours at most.                               采集