Give talks on the following two colloborative tasks. You should treat them as tasks for yourself instead of for two people, and you can prepare for 3-5 minutes and then talk for 2-3 minutes. Record your talks and upload here. You should record and upload the two talks seperately. You can also put down your notes in the answer area. After you submit your answer, you can read the suggested answers. 针对以下两个合作任务进行发言。请将任务视作单人任务,发言2-3分钟,准备时间3-5分钟。 请将你的发言进行录音并提交,请将两个发言分别录音及分别提交。在回答区,你也可以将准备期间的笔记记录下来,但是此项不作要求。提交录音后,你可以在答案处阅读回答建议。 Task 1