About the operation system of our phones

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2. which system dose your phone have [单选题] *    

Android

iOS

Winphone

3. how many years have you used the system [单选题] *    

1~2years

2~5years

more than 6years

4. In your operation system,which aspect do you do most [单选题] *    

playing games

watching moves

Woking

5. Do you think the system you are using is easy to operate [填空题] *    

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