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【单选题】
变速器倒挡轴与中间轴轴承轴线的平行度误差一般应不大于( )mm。A.
0.02
B.
0.04
C.
0.06
D.
0.1
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举一反三
【单选题】Why will it be fun having a baby in the woman's family?
A.
Because they are all excited about the baby.
B.
Because everyone wants to take care of the baby.
C.
Because they are all adults in the family now.
D.
Because the baby will bring them a lot of laughter.
【简答题】影响干涉条纹可见度的因素有相干光束的振幅比、( )和( )。当两列相干光波的振幅比是1:2，干涉条纹的可见度为( )。
【单选题】The family when they are having dinner together on the Spring Festival Eve.
A.
give each other the best wishes
B.
buy each other presents
C.
sing， dance and play cards
【单选题】查询出EMP表中COMM字段为空的记录( )
A.
select * from emp where comm='';
B.
select * from emp where comm=null;
C.
select * from emp where nvl(comm)=0;
D.
select * from emp where comm is null;
【简答题】食品中脂肪的存在形式有 和结合态两种。
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