单项选择题

What were the two environment campaigners claims against McDonald’s

A．The food carries health risks.
B．McDonald’s workers suffer poor pay and conditions.
C．Eating the company’s hamburgers can cause heart disease.
D．All of the above.
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单项选择题
The passage is mainly about______.
A．a new regulation for all airlines
B．the defects of electronic devices
C．a possible cause of aircraft crashes
D．effective safety measures for air flight
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 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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