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【单选题】
精馏塔设计时,若 F 、 x F 、 x D 、 x 、 V 均为定值,将进料热状态从 q=1 变为 q>1 ,则设计所需理论板数 ______ 。A.
多
B.
少
C.
不变
D.
判断依据不足
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【单选题】I asked her to drop me ______at the airport, but she stayed till I boarded the plane.
A.
in
B.
on
C.
at
D.
off
【简答题】I asked her to drop me ____ at the airport, but she stayed till I boarded the plane
【单选题】I asked her to drop me ( )at the airport, but she stayed till I boarded the plane.
A.
off
B.
up
【单选题】I asked her to drop me ( )at the airport ,but she stayed till I boarded the plane.
A.
off
B.
in
C.
at
D.
toward
【单选题】I asked her to drop me ______ at the airport, but she stayed till I boarded the plane.
A.
from
B.
to
C.
over
D.
off
相关题目：
【单选题】I asked her to drop me ( )at the airport, but she stayed till I boarded the plane.
A.
off
B.
up