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【单选题】
Wolfgang Kundt, who has developed an alternative theoryA.
has remained a puzzle
B.
lacks sufficient evidence
C.
is a university professor
D.
was generated by the explosion
E.
will kill many animals
F.
are attacked by aliens
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【单选题】In the gas chromatography, the following action that will NOT affect the resolution of the two adjacent component is to ( ).
A.
choose the detector with higher sensitivity
B.
increase the column length
C.
alter the chemical property of the stationary phase
D.
increase the column temperature
【单选题】Between the two parts of the concert is an interval, __________ the audience can buy ice-cream.
A.
when
B.
where
C.
that
D.
which
【单选题】Which of the following is used to keep two adjacent words on the same line?
A.
Keep lines together.
B.
Keep paragraphs together.
C.
Nonbreaking space.
D.
Nonbreaking hyphen.
【单选题】According to the last paragraph, the author may suggest that______.
A.
either of the two partial theories may be correct
B.
the new theory has been established to replace the two partial theories
C.
the new theory may develop from either of the two partial theories
D.
the new theory may combine many of the properties of the two partial theories
【多选题】There are two adjacent frames, what of the geometrical elements they may stand for?
A.
Two parallel planes
B.
A plane and a circular surface
C.
Two circular surfaces
D.
Two intersecting planes
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