abbr. 通信部（Department of Communications）；商務部（Department of Commerce）
考試真題
The center's "Shop with Your Doc" program sends doctors to the grocery store to meet with any patients who sign up for the service, plus any other shoppers who happen to be around with questions.
2018年12月四級真題（第一套）閱讀 Section B
Instead of having a literal meaning, it docs something - conveying an attitude — just like the -ed ending conveys past tense rather than "meaning.
出自-2014年6月閱讀原文
Since then, several academic institutions have begun to require IDPs for post docs And in June, the U.S. National Institutes of Health (NIH) Biomedical Research Workforce Working Group recommended that the NIH require IDPs for the approximately 32,000 postdoctoral researchers they support.