单项选择题

A．Its specialization in transporting small packages.
B．The low cost of its service.
C．Being the first airline to send urgent letters.
D．Its modern sorting facilities.
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C
单项选择题
A．Too many accidents are happening at nuclear power plants.B．They don’t see eye to eye when it comes to nuclear energy.C．Oil and gas resources are sufficient.D．Nuclear energy can save people in the futur
A．Too many accidents are happening at nuclear power plants.
B．They don’t see eye to eye when it comes to nuclear energy.
C．Oil and gas resources are sufficient.
D．Nuclear energy can save people in the futur
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