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【单选题】
在( )，列车不准分部运行。A.
对遗留车辆未采取防护、防溜措施时
B.
按自动闭塞法运行时
C.
、暴风雨雪
D.
电话中断后发出的列车
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举一反三
【单选题】they visited the Science Museum, they showed great interest in everything they saw.
A.
The first time
B.
For the first time
C.
At first
D.
Until
【单选题】___ they visited our school, they showed great interest in everything they saw.
A.
The first time
B.
For the first time
C.
At first
D.
At the first time
【单选题】They showed great interest in everything they saw they visited the farm．
A.
for the first time
B.
at the first time
C.
at first
D.
the first time
【简答题】郁证的发生虽与五脏均有关，但主要受累之脏为（ ）
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