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【单选题】Passage 20 How men first learned to invent words is unknown; in other words, the origin of language is a mystery. (20) All we really know is that men, unlike animals, somehow invented ce...
A.
beauty
B.
accuracy
C.
combinations
D.
charm
【单选题】域名是Internet服务提供商(1SP)的计算机名，域名中的后缀．gov表示机构所属类型为______。
A.
军事机构
B.
政府机构
C.
教育机构
D.
商业公司
【单选题】下列域名书写正确的是______。
A.
_catch.gov.cn
B.
catch.gov.cn
C.
catch, edu, Cn
D.
catch.gov.cn-