托业词汇每日练176-180

176.abbr. pound; unit of weight in ancient Rome equaling approximately 12 ounces
(a) attn.
(b) lb
(c) pd.
(d) AOL
177.abbr. manpower; personnel; human work force; human labor; staff
(a) corp.
(b) H.R.
(c) R&D
(d) HTML
178.abbr. directed to a particular person (generally used when addressing a letter or message) or issue
(a) attn.
(b) PTO
(c) C.T.O.
(d) C.C.
179.abbr. between noon and midnight; in the afternoon; after the hour of 12:00 noon
(a) p.m.
(b) C.C.
(c) C.O.O.
(d) Ltd.
180.abbr. secondary email address; copy of a document, message, or email that is sent to a third party
(a) G.D.P.
(b) PR
(c) i.e.
(d) C.C.

正确答案：
bbaad

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