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【简答题】
自动闭塞区段的车站,办理发车前应向接车站预告;单线自动闭塞区段的车站,还须得到( )的同意(列车调度员已下达列车运行调整计划时除外)。已向接车站预告,但列车不能出发时,发车站须通知接车站取消预告。
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举一反三
【单选题】What is the greatest danger for people living in a high-rise according to some experts?
A.
Lack of communication with others.
B.
No easy access to a playground for children.
C.
Developing criminal tendencies.
D.
Not knowing the neighbors.
【单选题】You are at sea in an inflatable liferaft．In high latitudes，the greatest danger is ______．
A.
asphyxiation due to keeping the canopy closed
B.
hypothermia caused by cold temperature
C.
collapse of the raft due to cold temperatures
D.
starvation
【单选题】A new computer system has been designed to stop ships sinking. The greatest danger 【21】______ a holed vessel is that flooding of its compartments will make the ship unstable enough to capsize. It is e...
A.
to
B.
on
C.
in
D.
for
【单选题】What is the greatest danger to life on Earth?
A.
Collision with small high-speed missiles.
B.
Collision with an astronomical body.
C.
Collision with stones from the sky.
D.
Collision with spacecrafts.
【简答题】-What is the greatest er for digestive diseases according to the author? - alcohol the greatest digestive diseases.
【简答题】电动机连续控制电路由( )和( )组成
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