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【判断题】
车削外圆柱面和车削套类工件时，它们的切削深度和进给量通常是相同的。()A.
正确
B.
错误
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举一反三
【单选题】— Where is your father? — He Australia and he Sydney for two weeks.
A.
has been to；has been in
B.
has gone to；has been in
C.
has been in；has been to
【简答题】请说出以下几个概念的关系:DBS的核心是( ),DBMS的管理者是( ),结构化的数据文件在DBS中称为( )。
【单选题】His ability is beyond question; _____ has been in doubt is ____ he is prepared to work hard A．wh
A.
13. His ability is beyond question; _____ has been in doubt is ____ he is prepared to work hard A．what; that
B.
which; whether
C.
what; whether
D.
that; that
【简答题】A．He has stayed on campus. B．He has been in an academic conference. C．He has been ill in hospital. D．He has been on vocation.
【单选题】— Where is your father? — He Australia and he Sydney for two weeks.
A.
has been to；has been in
B.
has gone to；has been in
C.
has been in；has been to
D.
has gone to；has been to
【简答题】DBS的核心是__________。
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