全部

1·The root of a quantity as indicated by the radical sign .

放在表达式前表示被开方根的符号。

2·Because the work needs to realize single-chip on the operation of open radical sign .

因为工作的需要，要在单片机上实现开根号的操作。

3·Results All patients showed axillary node enlargement as the first sign. 4 cases of OBC were operated with modified radical mastectomy.

结果4例均以腋下肿块为首发症状且均予手术治疗，手术方式为乳腺癌改良根治术，术后辅以放、化疗。