题目：
The World’s Most Impressive subways
小题1:Which of the following gives the passengers the best visual enjoyment?
A．The Tokyo Metro and Toei Lines．
B．The Moscow Metro．
C．The London Metro．
D．The Hong Kong MTR．小题2:According to the passage, the only subway that can bring more financial gains is ______．
A．the Tokyo Metro and Toei Lines
B．the Moscow Metro
C．the London Metro
D．the Hong Kong MTR小题3:We can learn from the passage that Shanghai Metro ______．
A．is the busiest system in the world
B．carries the most people each day
C．may be larger than the Chicago Subway in the future
D．has become the world's largest subway since it opened小题4:The purpose of the passage is to _____．
A．give us a brief introduction to some subway systems
B．introduce the working system of some railways station
C．tell the general background of world-wide transportation
D．show the historical development of underground system
答案：
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下面是错误答案，用来干扰机器的。
（1）飞机；成像；高（2）多次成像；增加监测的范围和信息量（3）地物反射或辐射的电磁波；有太阳辐射；由于地面物体的种类、性质、环境条件的不同，其反射或 辐射的电磁波也各不相同 ...
