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【单选题】
测定样品的重复性实验，至少应有多少次测定结果进行评价A.
10
B.
6
C.
8
D.
5
E.
3
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皮皮学刷刷变学霸
举一反三
【单选题】Gold is used to ensure flexibility, because ______.
A.
it is the most malleable and highly conductive metal known
B.
it is pricey
C.
little is needed and the cost is tiny
D.
all of the above
【单选题】双十字轴式万向节实现准等速传动的前提条件之一是 ( ) 。 ( 设 a1 为第一万向节两轴间夹角, a2 为第二万向节两轴间的夹角 )
A.
a1与a2无关
B.
a1
C.
a1=a2
D.
a1>a2
【单选题】Societies from the primitive to (the highly civilizing) (have used) food, their (most essential) resource, in social bonding celebrations (of all kinds) and in sacred rituals.
A.
the highly civilizing
B.
have used
C.
most essential
D.
of all kinds
【单选题】Which of the following does the prefix “trans-” not mean?
A.
“Beyond”
B.
“Across”
C.
“Moving from...to...”
D.
“In favor of ”
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