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What method of streaming live video is the least taxing on bandwidth in a large enterprise environment？（）
- A、TCP
- B、UDP
- C、HTTP
- D、Multicast
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填空题What is the name of the method that threads can use to pause their execution until signalled to continue by another thread？ （） Fill in the name of the method （do not include a parameter list）.
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单选题What can cause a thread to become non-runnable？（）A
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