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【单选题】
6控制感光元件对光线敏锐度的量化参数是( )。A.
光圈
B.
快门
C.
感光度
D.
噪点
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【单选题】In________of speed,safety and price, the hi-railway system is perhaps the world ’smodel railway.
A.
terms
B.
case
C.
need
D.
search
【简答题】railway ticket system
【单选题】The following statements about urban rail signal system and national railway signal system are correct,exept( )
A.
Nan Jing line 1 is urban rail.
B.
Urbal rail sevice objiect only passengers.
C.
Nation railway control distance is tens of kilometers.
D.
Urban railway depot has shunting function.
【单选题】The railway system was ______ on the successful plan used in other countries.
A.
copied
B.
imitated
C.
modeled
D.
molded
【单选题】China's railway system has carried out a real-name ticket purchasing system, _____ requires passengers to provide their ID numbers when buying tickets. [ ]
A.
in which
B.
whose
C.
who
D.
which
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