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【单选题】
在某个时期内,个体对某种刺激特别敏感,过了这个时期,同样的刺激则影响很小或没有影响,这个时期称为( )
A.
关键期
B.
发展期
C.
转折期
D.
潜伏期
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皮皮学刷刷变学霸
举一反三
【单选题】在基轴制中其基本偏差代号为( )。
A.
h
B.
H
C.
l
D.
L
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A.
B.
C.
D.
叶酸
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【简答题】液体对固体的润湿程度可用接触角来衡量,接触角θ>90。时称为润湿,接触角θ<90。时称为不润湿。< /div>
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【单选题】高速公路沥青砼面层的纵断高程允许偏差值为()mm。
A.
±12
B.
±10
C.
±15
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