您可以边看文字和视频,双重记忆保障、学习更牢固。您也可以放松双眼,让给耳朵享受美妙、纯正的中英文听力。手写签名 Handwritten signature [Source 来源: FDA] 21 CFR Part 11, FDAHandwritten signature means the scripted name or legal mark of an individual handwritten by that individual and executed or adopted with the present intention to authenticate a writing in a permanent form. The act of signing with a writing or marking instrument such as a pen or stylus is preserved. The scripted name or legal mark, while conventionally applied to paper, may also be ap