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【单选题】
评定平面上的圆、圆柱、圆锥或其他回转体任一正截面上的圆及球体任意截面上的圆,偏离其各自理想圆的误差的指标是( )。A.
平面度
B.
圆度
C.
直线度
D.
圆柱度
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举一反三
【单选题】On the top of the mountain ______, dating from the 14 th century.
A.
does an old temple stand
B.
stand an old temple
C.
an old temple is standing
D.
stands an old temple
【单选题】Meeting my old classmates at the 66th anniversary celebration of our school was an unforgettable moment, _____ I will always treasure. [ ]
A.
that
B.
one
C.
it
D.
what
【单选题】We have to realize how old, how very old, we are. Nations are classified as 'aged' when they have 7 percent or more of their people aged 65 or above, and by about 1970 every one of the advanced countr...
A.
all developed nations without exception.
B.
every one of Western European countries.
C.
countries in Northwestern Europe.
D.
some European and American nations.
【单选题】________ at the foot of the mountain is an old church _______ back to the 18 th century when it was occupied by the French.
A.
Standing；dating
B.
Standing；dated
C.
To stand；dating
D.
Stood；to date
【简答题】脾的白髓由周围动脉淋巴鞘、（）和（）3部分构成。
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