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【单选题】
夜间偶发噪声的最大声级超过限值的幅度不得高于( )。
A.
20dB(A)
B.
5dB(A)
C.
15dB(A)
D.
10dB(A)
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【判断题】标准作业三要素包括节拍时间、标准作业顺序和标准在制品。()
A.
正确
B.
错误
【简答题】我同科学家首先证实缺 是发生克山病及大骨节病的重要原因。
【单选题】下列哪种微量元素缺乏已被证实是发生克山病的重要原因
A.
B.
C.
D.
E.
【简答题】optician ( one who makes and fits corrective lenses for the eyes; root: opt/o)
【简答题】标准作业三要素包括 、 和 。
【简答题】The changes in language will continue forever, but no one knows sure 【M1】______ who does the changing. One possibility is that children are responsible. A professor of linguistic at the University of ...
【简答题】我国科学家首先证实缺 是发生克山病及大骨节病的重要原因。
【单选题】He is one of the students, who, I’m sure, always do _____best.
A.
his
B.
my
C.
one’s
D.
their
【单选题】I'm one of. the students ______never later for school.
A.
that is
B.
who are
C.
who am
D.
who is
【单选题】The defense lawyer was questioning the old man who was one of the ________ of the murder committed last month.
A.
observers
B.
witnesses
C.
audiences
D.
viewers
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