2. 计算机
  3. To　round　is　to　delete　or(66)one　or　more　of　the　least　significant　digits　in　a　positional(67)and　to,　or　not　to,　adjust　the　part　re

To　round　is　to　delete　or(66)one　or　more　of　the　least　significant　digits　in　a　positional(67)and　to,　or　not　to,　adjust　the　part　re

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问题 To　round　is　to　delete　or(66)one　or　more　of　the　least　significant　digits　in　a　positional(67)and　to,　or　not　to,　adjust　the　part　retained　in　accordance　with　some　specified　rule.　The　purpose　of　rounding　is　usually　to　limit　the　(68) of　the　numeral　or　to　reduce　the　number　of　characters　in　the　numeral,　or　to　do　both　these　things.The　most　common　arithmetic　forms　of　rounding　are　rounding　down,　rounding　up　and　rounding　off.　Rounding　down　is　defined　as　making　no　adjustment　to　the　part　of　the　numeral　that　is　retained.　Rounding　up　means　adjusting　the　part　of　the　numeral　that　is　retained　by　adding　1　to　the　least　significant　of　its　digits　and　executing　any　necessary　carries,　if　and　only　if　One　or　more　non-zero　digits　have　been　deleted.　Rounding　off　(69) adjusting　the　part　of　the　numeral　retained　by　adding　1　to　the　least　significant　of　its　digits　and　executing　any　necessary　carries,　if　and　only　if　the　most　significant　of　the　digits　deleted　was　equal　to　or　greater　than　half　the(70) of　its　digit　place.
选项 A、specifies
B、regulates
C、refers　to
D、assigns
答案C
解析
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