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单选题
24. What has Rosen found in his experiments about students not allowed to use cellphones?
A
They were willing to put their phones in sight but out of reach.
B
They had faster heartbeat when unable to answer the phone.
C
They couldn＇t resist the distraction for a minute and listen seriously.
D
They could control their anxiety when focusing on learning.
答案解析
正确答案：B
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