The basic causes are unknown, although certain conditions that may lead to cancer have been______.

admin2013-11-30  31

问题 The basic causes are unknown, although certain conditions that may lead to cancer have been______.

选项 A、identified
B、guaranteed
C、notified
D、conveyed

答案A

解析 句意:致癌的基本原因还不清楚,尽管某些致癌因素已经得到确认。identify识别,认出。guarantee保证。notify通知。convey传导。
转载请注明原文地址:https://kaotiyun.com/show/NRU3777K
0

最新回复(0)