题目

假定你是新华中学李华,你的外籍朋友 Michael 来信表示对中国文化很感兴趣,正巧这学期你校要开设话说中国节(Festive China)的线上课程,请你回信向他推荐此课程。内容包括:1)开设时间 2.)课程内容 3)报名方式。注意1)词数80左右2)可适当增加细节,以使行文连贯。 答案:Dear Michael, An online course entitled Festive China will be set up by our school. Knowing you are an enthusiast of Chinese culture, I'm writing to recommend it to you. The course is arranged on every Friday evening from September 1, consisting of 12 two-hour sessions, each of which introduces different Chinese festivals. You may learn origins, backgrounds and customs of them. If you desire to pa 如图甲所示是一火警报警器的部分电路示意图,其中R2为半导体热敏材料制成的传感器,其电阻随温度t变化的图线如图乙所示,电流表为值班室的显示器,a,b之间接报警器,当传感器R2所在处出现火情时,显示器的电流I和报警器两端的电压U的变化情况是(  ) A.I变大,U变大        B.I变大,U变小 C.I变小,U变大        D.I变小,U变小
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