2、合作交流：小组内讨论环节1中的重点及疑难问题（Pairwork and Groupwork）了解不同国家和地区的人们使用电脑的情况 3、精讲点拨：一般现在时的特殊疑问句；
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在司法实践中，虽然对刑法的溯及力问题一般比较容易把握，但也存在一些有争议的疑难问题，需作进一步探讨。
In judicial practice, although retroactivity of criminal law is easily grasped, there still exist some difficult problems in dispute, which need further discussing.
本文别出心裁地尝试发掘出对顾客之宅配服务流程中有所妨碍的实务疑难问题及绊脚石。
But this paper is rather unconventional and attempts to dig out the actual problems and stumbling blocks that hamper the process of delivering services to customers.
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