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【单选题】
初次体液免疫应答产生的抗体主要是( )A.
IgG
B.
IgA
C.
IgE
D.
IgM
E.
IgD
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【简答题】柴油机混合气的形成和燃烧过程可按曲轴转角划分为 、 、 和 四个阶段。柴油机三大精密耦合件是指 和 ; 和 ; 和 。__________________________________________________________
【单选题】Why do the words in the Primer all cluster together?
A.
To show the madness the black people have to face
B.
To indicate Pecola’s gradual descending into madness
C.
To indicate the alienation of Pecola
D.
To indicate the hardship that the black community has to face
【简答题】Why do British women, especially, long to stay young?
【简答题】Why do sometimes the young students accept the guidance given by their teachers with great enthusiasm?
【简答题】计算 ×0.6÷ ×|-2.5|=
【单选题】Why do American young people usually leave their families at eighteen or nineteen?
A.
Their working place is too far away from their families.
B.
Their families can not support them.
C.
Living independently is considered an important American value.
D.
American young people are forced to live independently.
【简答题】竖式计算验算 （1）2.4×0.15= （2）7.15÷2.5=
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