单项选择题

Having two eyes, instead of one, is particularly useful for ______.

A．seeing at night
B．seeing objects far away
C．looking over a wide area
D．judging distances
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单项选择题
People who are farsighted suffer from just the opposite problem. The word suffer in this sentence refers to ______.
A．experience
B．react
C．feel pain
D．imagine
单项选择题
What is said about the over 100 aircraft incidents in the past 15 years
A．They may have been caused by the damage to the radio systems.
B．They may have taken place during take - off and landing.
C．They were proved to have been caused by the passengers' portable computers.
D．They were suspected to have resulted from electromagnetic interference.
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